Social media rises and falls just like any other fad or fashion. It's a never-ending churn, as people (particularly, young people) inevitably crave something novel. There's little use in fighting the cycle, just as there'd be little use in fighting the trendy choices of a teenager.

It's frustrating to watch people en masse continue to make choices that don't make sense. It turns out that a lot of people are much more driven to follow the crowd than to have (let alone stand by) personal principles or rational decisions. Thankfully, we're not obligated to be like that. There's always some sort of counter-culture that bucks the main trends, and honestly? That's where the most interesting people tend to be.

If you feel driven to educate people on the futility of trends, then by all means, go for it. I just know it can be draining, and not everyone is going to be receptive. On the plus side, you sound like a rational person who actually thinks about their decisions - in a world full of followers, that can be pretty powerful.