The tiktok-ification of fucking everything into a trend is the worst in regards to this. The last few years, it feels like any time I'm interested in picking up a hobby that seems like it would/should be cheap and simple to get into, tiktokers have already blown through, turned something into a '-core' for content, and left nothing but over-inflated prices in their wake.
First off, I don't think tiktokers have as much influence over the cost of a hobby as inflation and every other market force that has increased prices. Everything is more expensive and blaming influencers doesn't help.
With that said, it's like Gen Z saw Millennials being Hipsters who pay wayyyy too much for 'vintage crap' and said 'Hold my vape,' then went and did the same thing to literally anything else.
I think you're mistaken about the tiktok thing, but okay. I've seen it play out in real time. The whole platform thrives on making/discovering a niche and plumbing it for as much content as you can. Pinterest also plays into that. I also think blaming it on a generation thing isn't accurate, its just 'old man yells at cloud' instead of bringing substantial analysis to a discussion.