I am not sure if that is actually the case. Everyone I know with anything else than a bambu still has regular maintenance, constant adjustment and failures. Bambu just works. Sure prusa are cool too, but much more expensive and still more maintenance.
I honestly don't want another maintenance hobby. I just want something that works and doesn't cost an arm and a leg.
In defense of Prusa, I’ve had mine for six years and have done basically zero maintenance. I’ve adjusted temps a few times when switching filament brands, and that’s about it.
You are right to say Prusa is more of a hobbyist machine while Bambu is closer to a consumer appliance. But within the hobbyist spectrum Prusa is more on the light hobby side these days. My first printer was a Printrbot where I was hand-entering G-code to move the nozzle around and level the bed. Prusa is a dream compared to that.
I like Prusa as a company (and the guy), and I like the community around it. The machine is simple, keeps working, parts are available, and you can understand and repair it if you need to.