My wife does the same in interior design.
There are lots of kids, true. But try looking at mommy-instagram and you'll see a whole other world.
But older people spend lots of money on non essential items.
Also have you seen how much time a stay at home Mom spends on social media? They'd give any teenager fair competition.
I am right here in Poland and I tell you, the things you show, and the things described in the article and in the first comment in this thread, they are all consumed en masse by young and mid-age adults (especially women). Lifestyle, sports, fashion, diet, craft, yoga, coaching, ikebana, it's all on Insta and Facebook and other platforms and when you see who's commenting, it's not JUST kids. And there's way more people 20+ than the kids. I never said kids do not have influence (sic) of that kind, they do. But when someone says "if you see something odd or stupid, it's the kids", it's just completely wrong. Kids have serious purchasing and decision making power now, but still it's just a fraction.