Well, sure, but how often do you play Urbies? I matched with you once last year – pretty sure it was you, at least; you had opened with a very ComStar-esque greeting in chat that match, and your forum handle made up part of your in-game name – and you weren't in any Urbie variant that existed at the time. None of the other UrbanMech pilots I've seen seem to be playing that one in particular; it's always the C-Bill version, a different C-Bill variant, some other special like a loyalty variant, K-9, Snowball, Street Cleaner... and now that they're a thing, the legendary IICs as well.
My point being, even if it turns out that you alone are deploying that thing from time to time, or even a very small amount of other people besides yourself, it's still a vanishingly rare variant to see fielded to the point most people will probably never have seen it before.