I think it’s just elitism. The worst example is Chris Titus making a video where he explains why you shouldn’t use Ubuntu. And then proceeds to make video explaining how it’s not actually that bad and he uses it with a different DE.
But now 300K people saw that Ubuntu bad for stupid reasons, from a “reputable” source.
I like Snaps. They can do more than Flatpak and when packaged well they just work. Sadly some apps on Snapcraft are abandoned or they just don’t work, but the same can be said about Flathub.
Proprietary companies are compelled to release on Snapcraft because it gives them advantages over other packaging methods. I’m just a user but I heard Snaps are easy to work with thanks to the documentation.
Firefox for example isn’t even in their apt repos. So instead of throwing an error, the Firefox meta package installs the snap, and tells you it’s doing that.
But I understand that Ubuntu isn’t for you if you want to avoid snaps.