Trying to help does not give you a free pass. Pushing a wheelchair user up a ramp without asking their permission first is both "trying to help" and inconsiderate (and scary and dangerous).

Before inventing a more advanced stair climbing wheelchair, you should ask a few wheelchair users if stairs are really the issue they need solving.

THIS.

I've seen visually impaired and wheelchair users have more issues with elevators than I have with not having proper ramps.

Although I have seen several wheelchair bound accessibility experts invited to give talks and there's no ramp or accessible way for them to access the stage where they're giving a talk about. . . . . accessibility.

That's a pretty ridiculous analogy. Simply inventing something doesn't force the invention onto anyone.