nobody is "doing" quantum mechanics per se. they are applying predictions from a theory that has been around for a while and those predictions work well enough in narrow domains to be useful.

i know enough to understand some of the fancy math behind it, but one thing to keep in mind is that what people think of when they say quantum mechanics is the mathematical model we're working with, not the real thing.

here, take a look for yourself: https://www.wolframcloud.com/obj/wolframphysics/Documents/so...