Cosmetic items being "used" instead of learned? Why

So what’s the deal with buying the seasonal items and forcing them to be “used” now? We can’t mog them year round, and sometimes I like to just equip them instead, since we can’t.

But the thing about it is that they aren’t added to your collection unless you use them. Even equipping them doesn’t save them.

When you buy them, they’re automatically bound. You can’t refund them, but they’re also not consumed. On top of not being able to be equipped without being consumed.

Why did this change occur?
Just let us equip the cosmetic items since we can’t use them year round.