Earlier quoted context omitted.
I think the thing trying to be pointed out here is that "retirement" is not inside what most people consider to be the game of a career. When you quit your last job, your career is over; that is the checkmate moment. Retirement, on the other hand, is the equivalent of the time between games (or after you quit playing games) when you have a static ranking from your previous play (maybe you're a retired world champion,…
again, we're arguing in circles because we are conceptualizing the analogies differently. our definitions of "career" are different. oh well.
ca·reer
kəˈrir/
noun
1.
an occupation undertaken for a significant period of a person's life and with opportunities for progress.
There really aren't different definitions. It's a "work life", it doesn't include retirement.