This is possible, we used to do it in college with cs1.6 😂 lan parties on wifi hotspot. Not a real mesh network, but a pvp played locally without an internet connection
Discussion
Yeah the WiFi LAN is great, but that's sending a lot more data.
Think Africa, where there's no internet, no hard line, foliage and trees affect connection etc.
Plus no one has any money so Bluetooth may be such a viable technology that we're not even fully utilising because we have other tech