I'm young and although I understand intellectually what people get out of it, I share your sentiment. I can find people telling stories of their fun campaign online, in text, which is faster for me to consume than listening to people talk. These stories do usually just tell the story and scrub out the "because X happened, we take out Y game mechanic and this is how it works", so I suppose it makes sense to watch a playthrough to get mechanic exposure.
But I just really… don't have the patience for audio and video when I can usually get what I want by reading a lot faster. I also do not need to make special accommodations to make others happy to read. No dragging headphones with me to avoid bothering the general public, and I keep more awareness of my surroundings when I can hear what is going on.
I share the philosophy of "why watch others do Fun Thing You Enjoy when you could just do Fun Thing You Enjoy yourself?"
I figure I'll just leave all these videos up for everyone to enjoy. As long as I do not view myself as some superior human being for the very, very elite trait of simply not sharing this interest, it's perfectly okay for me to not enjoy watching others play TTRPG. People are allowed to find things boring.