poorly defined career choices

 is cleric a career?

yes. you earn promotions until you can eventually boss angels around. like a traveling salesman for a mcdonalds company that has franchises everywhere

 is sorcerer a career? what about sorcerer-king? what about a sorcerer farmer?

hard to say

what does a sorcerer get paid to do?

(nothing. they don't study, they don't perform rituals, they don't sing, they don't make deals, they don't assassinate people, and they don't record history)

what does a fighter get paid to do?

fight.

 is fighter a career?

more importantly, if king arthur and his band of knights were fighters, why can't a fighter become a king? (a better question: why can't a fighter become anything, if a cleric is forbidden from becoming royalty but can become a bishop?)

 is wizard a career?

yes. you are actually a pay-per-view acadaemic paper service. your texts literally become more valuable as you advance your publishing career

 is druid a career?

well, is being homeless a career?