It’s a weird question to even ask, honestly. Like, is literature some sacred object that needs protecting? BookTok is just people talking about books they like, the same way my grandma used to talk about 'Gone with the Wind' with her bridge club. The medium is different, the energy is different, but the core activity is identical.
I get why some folks feel alienated. The tropes that dominate there—enemies to lovers, dark academia, morally grey love interests—aren’t everyone’s cup of tea. But I found 'Piranesi' because of a quiet, atmospheric BookTok video, and that book is as far from a romantasy as you can get. The algorithm shows you what you engage with. If you’re only seeing one type of book, maybe your own scrolling habits are part of that equation.
It feels less like ruination and more like expansion. More people are reading, more books are getting sold, more authors can make a living. That’s a good thing, even if the discourse around it is sometimes shallow or repetitive. You don’t have to participate in the discourse to benefit from the wider availability.