I think being honest about what is/isn't a hobby is necessary too, especially for ones that require a lot of equipment.

E.g. watches. There's a lot of places on the Internet to discuss watches, and people that think being "into watches" is a thing. But all you're actually doing 95% of the time is buying watches and discussing what watches one buys. People can get very neurotic over this and develop weird tribal sentiments around it. I've seen this derisively (but also appropriately) coined as "bugmen" behavior. Same idea with craft beer. It's just consumerism in disguise.

Notice I don't mention watchmaking/homebrewing; those are legitimate hobbies.

That is a really interesting distinction. I have had a couple hobbies that ended up being “buy all the things as if you were going to do this hobby” more than actually enjoying the hobby, and they were spectacularly unfulfilling in the end. More like chasing some consumerist ideal than anything else, for sure.