A company reusing “pre-existing tech” doesn’t really seem to be the issue here. Were they supposed to invent a whole new communication protocol for this use case?

The issue I see is that they didn’t bother to obfuscate the MAC address of their BLE equipment. Maybe there is a reason they’re not allowed to change the OUI of their BT transmitter?

Do not try and bend the spoon, that’s impossible. Instead, only try to realize the truth… there is no spoon. Then you’ll see that it is not the spoon that bends, it is only yourself.