In my book which is set in the near future (some hundreds years from today) the mankind has mastered interplanetary travel. Although the travel to let's say Pluto is possible, it still takes several months and is not available for ordinary people.
Would a spaceport on the Moon give a considerable advantage for the interplanetary travel at this level of technology?
I've looked at this question https://space.stackexchange.com/questions/10466/why-dont-we-launch-spacecraft-from-the-moon and basically the answer is not really. But than I watched Ad Astra some time ago, and there they go to the Moon first and only after that go to Mars. Is it pure science-fiction without any scientific background?
What I have in mind is a huge moon base shared by different Earth nations to launch their spacecrafts further. This basically impies that the benefit of starting from the Moon is so big, that different countries can even overcome their political differences and otherwise hostile bahavior for the sake of maintaining this expensive project.
Can I plausibly pull it off or is it too far fetched?