Stashing COP and SOH

[Rare]

So, I only recently found out that the Vanity Crown of Persistence and Shield of Hallows are unstashable. I guess I missed the message.

So I was thinking, why not have an open discussion about this? I am not sure what the motive is to make these items unstashable. If I have 5 toons, and I get to the level cap with 1 of them, I don't see why I shouldn't be able to get to use this vanity item with my other toons.

I understand that my other characters didn't get to the level cap, but these items are MINE. It shouldn't matter which character I got them with. The fact is I earned them fair and square. I should be able to use them how I want. I really don't see the purpose of this.

This is just my opinion. Please weigh in you so desire.

Thanks,

ATL

EDIT: Just want to clarify, I'm not mad and I'm not calling out STS or anything. I just don't really get the logic behind it.