Earlier quoted context omitted.
This is so tiresome. If you’re reading this you’re privileged. Somewhere on this planet is a single individual human who is the very unluckiest and most unfortunate. Everyone else is privileged. Even that guy is lucky to be alive now and not 1000 years ago. None of this makes OP wrong.
Yet, it doesn't mean that quitting is always going to be the solution. There are specific conditions that need to be met (sufficient savings, decent possibilities to get a similar job, and so on) in order for quitting to not hurt you financially and professionally. Yes, everyone can be seen as "privileged" if we compare our lives to how it was back then, but that doesn't dismiss the issue.
But that fact doesn't mean it's a real solution many can and should try (or threaten to try).