Or maybe its just more noticeable than the people who pick up something new, get really into it, and do stick with it forever, which is also something that happens. I know guys who got super into grilling or woodworking or whatever and are still at it after many years.

I try to give people some grace when they suddenly get into a hobby really hard, because how else are you gonna find out if you like something and have a long term hobby if you never try it yourself first? It also helps that most people I'm friends with are some flavor of AuDHD, so a lot of conversations start with "so what are you hyperfixating on rn?"