Requires an underlying network infrastructure to communicate over. Not quite the same as disparate peer to peer wireless mesh.
Your statement may be tongue-in-cheek, but this sort of attitude is why we don't have this deployed on devices en-masse. Non-technical users want something that just works with one tap, not something that requires them to manually set up an ad-hoc WiFi network every time they want to use it.
My original point was simply that the technology exists, and pointing out that there isn't a decent client doesn't negate my point.
It is unfortunate that our ecosystem is arranged such that a decent client hasn't happened.