you can ship the uncured degassed thermosets under vacuum in a bag or hard container if it is filled under vacuum. it isn't inert, but as long as it's not flammable it is shippable.
you may be right that everyone has to have a pressure pot anyway because when you attempt the molding you have to take it out of vacuum at some point.
as far as injection molding thermoplastics is concerned, the limiter there is, as usual, tooling. i have been working pretty hard to make machining accessible and there is a long term plan that will allow me to do small scale machining for low pressure mold tooling, but serious mold tooling has to be done at a large gb level. it makes some sense because precise tooling is so expensive that it's only more efficient than positive or negative prototyping and low volume production machines (mills, lathes, grinders, straight up filing, ffm, FDM, etc.) if your volume is very very large.
and yes, there is community mold-making already. abs molds for keycap sized parts are very very possible to build with FFM printers, hand tools and a few solvents.
