We really should be able to glamour other jobs' sets

[Iscah]

If it's not relevant then why does your tank have to wear armour and your healer a robe?

You're misunderstanding my point. I mean it's irrelevant that casual gear and healer gear are both lightly armoured. That does not make them the same thing.

Right now, both roles have the same choice of [their gear] or [casual gear], even though what counts as "their gear" is different.

Saying that because tanks can replace [their gear] with [casual gear] means that healers should be able to replace [their gear] with [tank gear] is not logically an equal trade, regardless of whether you think they should be able to or not.

[drtasteyummy]

You're misunderstanding my point. I mean it's irrelevant that casual gear and healer gear are both lightly armoured. That does not make them the same thing.

Right now, both roles have the same choice of [their gear] or [casual gear], even though what counts as "their gear" is different.

Saying that because tanks can replace [their gear] with [casual gear] means that healers should be able to replace [their gear] with [tank gear] is not logically an equal trade, regardless of whether you think they should be able to or not.

That is because [casual gear] 'armor' design is not the reason a healer should be able to transmog [their gear] with [tank gear]. It refers to the fact that the whole 'casual' thing is so comical that there is no point in sticking to the system anyway.
That doesn't mean a tank shouldn't still get [their gear] and respectively so does the healer, it solely means that there is no need for restriction of glamour to stay 'true' to the 'fantasy' when somebody can come to the raid in a clown outfit.