The ways to change this is either regulation or market pressure.
Regulation is out of any question, both in the US and the EU. While there may be some hard-won progress in the "right to repair" fights recently, the needs of hobbyist electronics people aren't on any politician's radar and I doubt that will change soon (even if easier access to high quality electronics could unleash so much potential for innovation!).
Market pressure is out of the question too, simply because the volumes that us hobbyists order are too small. For what it's worth I'd pay a couple hundred bucks for an 1:1 q&a/consulting session with an expert from a semiconductor or other company for my hobby projects and I'd also accept a reasonable "small volume handling/shipping fee" for getting my hands on ten chips... but I'm the utter minority of hobbyists who can actually afford that for a project that won't bring any profit. Corporate entities however who are going to sell thousands or orders of magnitude more units of some random gizmo can afford putting up six figures upfront anyway... so they have no incentive either to pressure vendors into providing better service.
Is in-house CPU printing a (future) possibility? I don’t know a lot about manufacturing, but is a an etching machine a possibility to make custom boards or chips? Even if it’s not up to today’s tech.
Not with current fab / material processes. Silicon Valley hosts the most Superfund sites in the US for a reason - there's an awful lot of really nasty chemicals involved in semiconductor manufacturing, some of which can probably be used to make drugs or explosives (so subject to various control laws), and the feature sizes are so small that the fabs require expensive air filters...
Custom boards are a thing already, you can go up to three layers in an amateur/hobbyist setting AFAIK, but that won't help you much when dealing with high-frequency stuff or very fine pitch settings as the thickness and other parameters will vary across the board. Many countries already have somewhat cheap-ish "rapid prototype PCB" shops, some even do assembly for you. That's good enough even for most HF stuff.
