Everyone has to work for food and shelter. If you try and build a society where only some people work for their food and shelter, but they have to also pay for someone else's food and shelter, that will breed resentment.

I also don't hold out much hope that if we remove all the bottom end jobs it will free people up to "persue more important callings". Your local DoorDash driver is probably never going to be an airline pilot or a computer programmer. And even if they wanted to and had the ability, there won't be enough positions open anyway.