Another thing that makes no sense about this Fixed Only policy: Even if you're okay with the fact that this casual content has become hardcore content, you're not forced to do any other hardcore content in the game with the same people all the time. It's much easier to clear Alexander Savage with a static, but you have the option not to. If Joe isn't able to make it to raid, he can be replaced. If you weren't able to clear a floor with your static, you can try to clear it with a PF group.

With PotD, if one of your party members isn't able to make it, too bad. You don't get to play. What happens if the person you entered with quits unexpectedly? You're completely screwed. This is just straight up bad game design.