there's no "story" in make sure you're not sedentary, whereas the evils of screen time are a sure fire click winner.
True. I do think it's weird to even talk about a baby being sedentary though - they need plenty of floor time, but what even is sedentary for a 3 month old? Whether the TV's on or not they won't be doing jumping jacks.
DS is 9 months and if the TV's on he'll sit and stare at it for about 2 minutes then continue to crawl around. If that's harmful to his development then we should also stop using the washing machine, which gets a similar reaction.
He mostly sees grown up stuff, because he seems to just like the lights and colours regardless so why would we subject ourselves to Peppa pig? We have stopped watching actively unsuitable things in front of him now, though - when he was your baby's age, though, OP I got through a whole season of Orange Is the New Black while breastfeeding him, which hopefully won't prove too scarring... Aren't box sets the standard way suggested to get through cluster feeding?