One example is that psychology - they are just not wired to look at complexities of other people's emotions, origins, mental issues and so on. People are good or bad, weird is a third state for them and thats it. They are trivial to manipulate via emotions, just like their whole generation is.
I mean I talk to them regularly, but its rather shallow talk. Anytime I go deeper ie about my deeper experiences in some remote place and culture, their face goes blank, they don't have much to add. They look at the photos and love those but that's a very tiny part of whole story. I learned over decades what topics work and which are for other people.
Its all fine, apologies if I sounded worse than things are. Parents are just parents, for adults they are not meant to be the closest people in the world, that's rather an indication of some social failure to find and integrate with peers down the line.
Younger generations live emotionally richer lives. Or maybe thats not the best description, but something along that. I can't talk about deeper emotions even with my parents, the generational gap is absolutely huge. They never talk about theirs, and trying to start the talk ends the talk, they simply are not wired for such introspection. Both proper university educated which is a small miracle given how they and their parents were viewed as potential enemies of communist state.
They lived their whole lives under soviet oppression, never left Europe, don't understand modern world and technologies, they lived their whole lives in single monolithic culture. Critical thinking outward and especially inward is not in their runbook. I live past 20 years away from my home country, travelled the world that changed me (for the better) permanently. i tried psychedelic drugs a bit in the past, also a profound and probably permanent change they never had a chance to go through. I was/still am doing a number of potentially dangerous mountain sports that expose you to fear of death regularly, and one has to overcome that fear and move on, over and over - definitely a personality-changing experience. And so on.
Its hard to find people to talk about ie backpacking travelling to exotic undeveloped remote places even within my peers, who did that. I gathered more life experience living in 3 countries, dating ladies from various cultures, raising my kids in a foreign culture than they ever could. I understand psychology and people way better than them.
The roles reversed some time ago - I am helping them, however I can. As long as they are actually willing to listen, not every topic is like that. I can't talk politics to them, russians did a very good job in subverting public opinions of large portions of population into absolutely illogical self-harming position, and just stating truth leads nowhere.