I agree with you that these are at the root of the issue, along with a few others (such as a lack of community. But, that might be from judgement as well). And the world needs more people like you then. Those who aren't afraid to go after their dreams, even after they've been told countless times that they'll fail. Can I get a ride in the Iron Man suit once you've built it?
I actually excel when people tell me it cant be done. Ordinarily, i quite often say 'cant be done', but when people tell me, ill keep on going until it can be done. Why? I hate people telling me what I can and cant do. And sure you can, you can even help me test it! I just need to learn autocad, lots of physics , chemistry and biology, buy some 3D printers and we're good to go!