That makes absolutely no sense. Especially because they use all areas and bedroom areas
I am sorry that we are not able to explain it in a way that makes sense to you, but nothing will change the fact that you current hutch is not big enough for the number pigs you have living in it.
However if you are unable to give them more space, then there really is no point debating further.
Many animals live in cages/spaces that are far too small and do need meet welfare standards.
They are not all laying around being sad - they are hard wired to survive and make the best of what they have.
I have lost count of the number of times I have seen people say that tier pets are 'fine' or 'happy' so there is no point doing things differently.
The purpose of the Forum is to educate people so that when they know better they can do better.
I was in the same situation when I first joined, and had planned housing that was not appropriate.
So I read the advice of experienced owners and experts, admitted I had made a mistake, and got new cages - my piggies benefitted, and I also did because I got to see their full personalities emerge as well as a whole raft of natural behaviour that they were able to exhibit because they had the appropriate environment do so.
They were fine and happy in their original set up, but they were even better and happier in a bigger set up.