can i quit please?

you know the saying,' if you don't like your job, just quit'?
well i figured that it only applies to the rich. not if you're living away from your parents in a different country or if you have bills to pay at the end of every month.
or maybe its not about being rich after all,
maybe it is more about you not having the guts to be a little more adventurous
and you pretend that complaining about it actually helps