Re: So, Remo UX heads are thin.
I left my new Black Panther snare at a friends place a couple of months ago and within 4 days he had managed to dent the ux head it had about 5mm or more, completely taking the coating off the central inches. I replaced it with an Evans g1 and that's much better sounding, can't say I have let my friend rip at it though, so I can't speak for the difference in durability.
As for why they put them on their kits, cheaper, end of story. for example $999 is much more appealing than 1049, even though you'd be adding more $ for better/more durable heads.