[Klinky]

If it was really that easy then hobbyists would have found a way to do it on their own by now(e.g. 3D printing). You can't just demand that someone open their billion dollar fabs to amateur hobbyists. It is very likely if the fab is still operating at a certain process, it's because they have profitable business churning through it. If it's not profitable, they retool or close it down. An idle fab is money down the drain, and it's really doubtful hobbyists would be able to fill the gap with a bunch of one-off production runs, while likely needing a lot of hand holding.

Custom circuit boards are coming down in price, maybe custom lithography will come down in price at some point to be accessible to hobbyists / startups.