Helping people medically with technology, what is the reality?

So whenever I see someone that is disabled, missing a leg, something like that, I genuinely feel bad for them. I wish I had magic powers and could just heal them you know.

With regards to tech, I know medical stuff has a lot of red tape. What is a realistic way to help people, I also realize some of this tech is advanced/not someone just a person can do.

Background is probably an issue too I could see.

Obvious/easiest is to donate money. But wondering about working in the field and would be the pay be decent.

Specifically about technology like motorized wheelchairs or robotic artificial limbs.