Agreed. Containers are the reason I use Firefox -- they are a much better fit than profiles. But I've not been able to successfully communicate that to Chrome users. Its like their mental model is stuck, and they can't grasp the differences.
For example, I have a main profile where I have personal bookmarks and different extensions (and more aggressive adblocking). I also have a work profile with a different theme, different bookmarks, extensions, etc. And I use containers in both.
Containers are nice, but they're not profiles. We have to understand that not everyone can or wants to have one profile with everything in it.
One feature I was missing from Chrome was Tab Groups. But recently (I don't know when it started) the feature showed up in FireFox too :-)