Yup. You got it!
What I am saying is factually correct. There are a lot of young brain-washed (indoctrinated) folks who post on HN. How can one tell? Experience. When you read some posts from the perspective of having lived a life outside of academic and religious indoctrination long enough you detect sometimes subtle cues that reveal it. These posts are always detectably different from those of someone with what I might call "independent" life experience.
One of my favorite examples of this is the "blame the rich" meme. It's a very popular meme. Rich businessmen (never women, BTW) are greedy, get paid too much and oppress the little guys. Such statements can only come from a position of indoctrinated ignorance. You can derail such ideas with a few well-crafted questions that quickly point out just how ridiculous a concept it is.
Indoctrination is a powerful force. People will blow themselves up and kill others because they've been brainwashed into a belief system that makes zero sense to someone watching from the outside. What most don't want to accept is that indoctrination isn't limited to extreme quasi-religious ideologies.