Yeah but B listers can make a very good living, often times with more steady work than A listers since they don’t have to manage their reputation as much. They’re the session musicians, or the AAA dev working on his indie project on the side of film/TV. Still they’re also a minority but if you show up and do your work for enough years it’s an achievable track.
Same model. Most actors stay poor and barely make it. You just only know the most successful ones, which is a tiny minority of the acting pool.