As a firmware developer who has also done client-side Bluetooth development on Android, iOS, Windows, and Linux, I can tell you with 100% confidence that this just isn't the case. BlueZ is the best Bluetooth driver on any major platform, and it's not even close. The Windows one crashes constantly, and the iOS one has arbitrary nonstandard limitations and it tries to be clever by initiating pairing when you don't tell it to. BlueZ is the only one that actually implements the by-the-book Bluetooth spec, and does it without randomly exploding.