Because it's not as popular as WiFi or Ethernet or USB. It hasn't had the decades of hard core, hard knocks field usage of WiFi/Ethernet/USB. So the chipsets are less robust to errors, are less sensitive to highly noisy environments. The drivers aren't as battle tested as the other connectivity.
WiFi in its initial days (802.11b) reminds me of bluetooth right now. Quirky, bad tools, weird errors. But WiFi caught on and manufacturers started throwing $B at R&D for better chips and better drivers for those chips.
WiFi in its initial days (802.11b) reminds me of bluetooth right now. Quirky, bad tools, weird errors. But WiFi caught on and manufacturers started throwing $B at R&D for better chips and better drivers for those chips.
Bluetooth just has a problem with scale.