Preach. Put some garbage reality TV on and she looks at IG while I look at Zillow or whatever. I work from home and she's home with the kid, so we're talking all day. Nice to just sit next to each other and relax.
Are they causing more problems than stuff before? Probably! Much of what's on it is explicitly designed to be addictive. But I suspect it's by a relatively minor amount, and mostly stolen from other also-bad-for-you options that have declined / been out-competed. People have done this kind of stuff for literally forever, phones didn't invent it.
1: Not to imply they should or should not have that stigma. Just that they exist and work as a distraction too, and few people will immediately judge you for using it, unlike many also-popular alternatives.