I do think it’s that but with a dangerous slippery slope embedded within. FB will optimize for engagement no matter what so if you linger on one political post they put among 99 friends and family posts they’ll immediately amp up the ratio. You need to somehow maintain a perfect ratio of time spent on FB to fresh family and friends content, otherwise FB will fill the space for you.

My mother in law is an example of this. She’s always been “mildly” political, e.g. she liked Planned Parenthood’s FB page. Now her feed is a mess of anti-Trump stuff. I’m anti-Trump myself but a lot of these posts are barely coherent and she’s mentioned before now when she meets someone new her first thought is whether they voted for Trump or not. To my mind it’s a direct result of her slipping down that slope. She frequently has interactions (“fights” is too strong really) with friends and neighbors on her feed who are clearly off piste in the other political direction.

I even had an example of it on my own profile. For some reason I had a post from a local (NY) radio station in my feed, about Mamdani. Curious to click into the comments I saw a cesspit of vitriol by boomer age users, attached to their real names, sometimes with smiling photos with their grandchildren… for weeks after whenever I logged in there would be a new post by a different conservative leaning radio station, ready to make me angry. Engagement > user happiness.