I don't know if you would consider this reason "cultural", but a practical reason might be a limitation on the knowledge in your library. Mining might be impractical if lacking the interim knowledge (example - how and where to find ores, how to safely handle them/processes/byproducts, and even what they look like). This can be either because that knowledge was lost, or because on this planet the geological signposts are somewhat different - ie, some different trace mineral in this ore here, its a different color than expected, so didn't get identified... oops.
Modern metalworking knowledge often skips these steps - assuming equally modern detection, or sometimes pointing out historical deposits, neither of which would necessarily apply to a people on another planet with knowledge and no tech. When I've looked, there's a lot of bog-iron and copper nugget level work, that is, what one can easily find and recognize, and a lot of advanced processing and the underlying cause-and-effect, and the in-between is a little sparse - not least because it is pretty complicated stuff, tangled in with all the chemistry, dyes, medicines, and a lot of risks and dangers.
For the rest of the tech branches you mention, there's a fair amount of hobby-knowledge, and that and a bit of reverse-engineering may be enough to get them started - but hobby-level metal-working starts with processed metals and shapes it, or one builds a mechanical smelter and forge but works with purchased materials or already-identified ores. It's not nearly the same thing as walking out into the wild with nothing and finding ores, mining it with no tools, and processing the ores, managing to separate and name and safely work with chemical components and reactions, manage health risks from said processing, its byproducts, and its waste materials, and all the stuff that happens before we get to what we would consider raw materials.
The thing is, your library is going to be an enormous help - and an enormous hindrance. Yes, both. It will let them shortcut some parts of the discovery process, knowing the principles of what kinds of things work and how they would work - but a lot, a lot of the details are not gonna be right for this new planet. Knowing how the process is supposed to work, all that knowledge your people saved, will let people figure out ways around that difference - eventually.
So, hey, we need this chemistry reaction, we've got... umm... hardwood ash was used historically, but the wood-equivalent there may not have the chemistry that lets us make lye or potash, and still less might it map on to whether that wood-equivalent is harder or softer. And whatever they found for, say, soapmaking may not be the same thing for nixmatalizing grains (chemical processing), and may again not be suitable to use as a flux in metalworking.
Or to bounce off of Thriggle's suggestion of a lack of charcoal/coal/oil, if they have some but not enough, they may focus on that lack, and never experiment enough to realize that shelf-mushroom or this peat moss or the other kind of coral can be processed and used the same way - especially if they skip the exploration or experimentation where they might have found out in favor of what they already knew would work. And because of that, I don't think they'll be as far along with some subjects, like metalworking, than they might be in those subjects if they hadn't had anything.
What I'm trying to get at, here, is those missing steps will mean the knowledge isn't easily usable without a lot of work and experimentation. It will take a lot of time and work to recreate these processes. But if several branches have these processes half-filled out, then even if it takes lifetimes to fill out the rest, it will still be more productive to work in that than try and figure out the other processes where the pieces missing are all in the beginning and so one doesn't know how to start. So people will neglect those branches (like metalworking) far, far more than if they were figuring out everything from scratch, because working in those already known areas gets them, well, more bang for their buck.
Add in the time it takes to ensure basic survival, recover from whatever lost them their tech, to expand and support their population, to ensure a decent standard of living (important now, not so much historically, also takes time/effort), and rediscover multiple branches of technology up to current day levels - it is really not surprising some branches like advanced metalworking have fallen behind, even by quite a bit. Maybe they would catch up eventually, but that isn't so when your story is set.
I would imagine metalworking wasn't completely neglected, but it may lag far behind other branches. And one of the things advanced tech does, in whatever branch, is give more flexibility to its applications, including ways to work around problems - like finding alternate solutions to things that might have taken advanced metalworking for us - ie, we need this tool, originally it was metal but now ceramics or glass can work, or else needed metalworking as a prerequisite - ie, we need these chemicals, originally discovered when refining/mining metals but now we know what they are. That knowledge gives your people alternatives, and with alternatives metalworking becomes less critical, less urgent, with fewer people working on it, and so makes (much) less progress, overall, than the tech branches that are being leaned on to fill in.
