I hate to rain on a good rant, but do you have any actual data to back up all these strong assertions?

Contact tracing (the old fashioned kind) works quite well when it's done aggressively and case counts are low. However, for most of the Western world neither is true, and throwing Bluetooth at the problem isn't going to help. Neither can it magically prevent infections from people who don't know they're contagious, which we've come to realize is a significant feature of how COVID spreads.