It's crazy how many people believe being poor means you're stupid. Not true! Thank you for pushing back!

Who said anything to that effect?

Are you implying that people who have better things to do than watch documentaries are stupid?

Social class is correlated with income, but it's not the same.

Similarly, entertainment preferences are correlated with social class (and with income), but again, they are not perfect predictors of each other.

So a few anecdata wouldn't undermine anything here. Though in fact, your example actually strengthens the argument I am making: you are the kind of person that prefers watching documentaries over other drivel, and you are the kind of person who managed to get themselves out of poverty. That's likely because you have the preferences, habits and skills of someone who is at least middle class in a social sense, even if your income took a while to catch up.

(Keep in mind that we are talking about social class in a rather abstract fashion here. German middle class mores are different from American middle class mores.)

Wow, that is some overt classism right there. The world is a much better place is you just see people as people. Everybody is trying to achieve the same thing regardless of their "class". Security and safety for self and loved ones by whatever means are available to them with their skills and knowledge.