Suppose we lived in a society where people didn't specialize and there were no careers. What would the day-to-day look like?
Well, you probably wouldn't be able to get pharmaceuticals. The expertise required to conceive and produce those is massive. Ditto for healthcare.
How about food? Without farmers, we are stuck growing our own or foraging. Too sick to forage or work the field? Then you don't eat.
Somebody comes by your home with a weapon. Who do you call? Nobody, that's who.
That's what society looks like if everyone opts out of a career. And if everyone can't do it, nobody should be able to. Fairness and all that. Extenuating circumstances notwithstanding, of course.