I get your point, but I'd say that TikTok and YouTube are 'passively interactive'. That is, they take whatever (possibly transient) interest you have and give you more More MORE. That can create some fixation which otherwise wouldn't have existed, or deny some other interest that might have been pursued.
TV stations didn't know when you changed the channel, what you changed it to, or whether you were watching or just had it on in the background. Today's more interactive sources have a greater and more effective kind of weaponization than TV ever did. Also, in the past, people generally had a choice between watching TV and being somewhere else. Now, entire families pull out their phones and ignore each other while sitting at the same table in a restaurant.
I'm sorry for the troubles your mother had. I guess I'm lucky that my own mother was more caring and present than yours seems to have been. But her mother was a whack-job. That meant that my mom had 'hidden baggage', some of which wasn't so hidden when I figured out - after she died - where to look for it. Much as I try to let go, I still carry some of it to this day, and keep tripping over missing puzzle pieces.
All that's to say that I may have at least some sense of what you experienced.