First of all, you must resolve the technology dichotomy
A technology dichotomy is when the fundamentals required for a particular technology do not exist, but the technology exists nonetheless. You have one. A high tech society that doesn't have the order and predictable lawfullness needed to permit the millions of scientists, technicians, and engineers necessary to create it? (Much less the farmers, miners, carpenters, masons, pawn brokers, morticians, and even teachers that support them?)
Your first problem is explaining how this society even exists. Are they getting the tech as off-world imports? Is it magically summoned? Is it a gift from the Flying Spaghetti Monster? Because it can't exist in the world you described in your question.
Second, you need to explain how it's being maintained
And maybe this is how your question gets answered. Tech breaks down. If no one is being educated to repair it, then your society has maybe 10-20 years before that tech is gone and all that's left is a few Westworld androids and Mad Max.
You've suggested that all the education is online but there's no predictable lawfulness (dichotomy!). Who's the benign being operating the Ineternet on your world? Wouldn't they, being corrupt, want to starve people of education to guarantee the tech breaks down, reserving only to himself and a cadre of consecrated ones the precious
juice knowledge that keeps his tech (and that one seemingly unkillable dude) going? If that's the case, then he's forcing people to get an education just to keep his power over the world's apparently only source of knowledge.
Social entropy would kill this society fairly quickly
Most people don't realize just how complicated the dance of life really is. High technology is a luxury. Any society can exist without it. Every society must work like dogs to maintain it. Take a couple of hours to think through the pyramid of people needed to design, produce, and maintain high-tech. And then outline the minimal pyramids needed for food production, mineral production, and basic safety. What you quickly realize is that 90% of our society exists to support the luxury of technology.
How were the pyramids built? You guessed it... social organization
Every one of those people I just mentioned must work with a basic expectation of law and order or the pyramid quickly becomes a house of cards. Even a criminal society has order. The majority of any society must predictably work together or that society implodes — and the luxuries are the first thing to go (well, maybe the second. Frozen burritos might be the first to go).
Why will you need face-to-face teachers? Because society can't be so lawless that the children won't be required to receive a predictable education, from Kindergarten through college. High tech doesn't exist with a 6th grade education. Somebody will need to motivate the kids to focus on their education or the luxury of technology will vanish.
And history has proven that it generally won't be their parents.
Even homeschoolers are highly organized. Just talk to one. They'll tell you all about all the other people they depend on just to educate their children at home. It is not chaotic. And they'll tell you that face-to-face time, while not necessary all the time, is nevertheless crucial. Why? Because it takes little time for an 8-year-old to figure out how to play everything from solitaire to Halo — anything other than their homework.
May I suggest that you need to focus your crisis on the efforts of organized groups to become pre-eminent in the world? In other words, the individual cannot be lawless within the group, but the interaction between organized groups can. That provides the structure needed to justify the high-tech-manintaining education needed and, thereby, teachers.