Yeah, BT is literally impossible to use live. Every ms counts, and here we’re on the order of 50-150. Even native drivers often aren’t good enough for wired equipment, forcing users to upgrade to ASIO drivers! I know I couldn't use my guitar interface or keyboard without them during my Windows days, though the situation is admittedly much improved on the macOS side.

Another thing is that primary thing you want to do wirelessly in live situation are mics and maybe instruments. That implies relative large dynamic range on input (certainly more than 16b samples), which is hard to do digitally in sane way.