I can only speak of my experiences, but I guess there's something I need to point out first.
No, these are not every single group. If I have to be honest, it's probably not even half of them, you're right on that.
HOWEVER...
It doesn't have to be. It just has to be enough for a player to consider the possibility enough. I remember specifically in 4.1 I stopped doing all group content for the patch, because I just couldn't take the chance anymore. The straw breaking the camel's back being
Right here.
As far as things are concerned, this was fine, perfectly acceptable playing, that was enough to continue content, because I had to push whatever I could with my MNK to get through it. Sure, like I said, not even half the parties are like this, but if I end up at any point questioning if queuing is worth it, even with just a small chance of this, then something certainly is wrong.
Enabling isn't okay. Players should be expected to at least contribute if they're gonna do group content. I don't see how that's ever a bad thing.