Well yeah those are valid points, however with close to a million pings in 2 weeks, I'm going to go out on a limb and say that number won't be replicated in positive tests. I mean basically this is the equivalent of ringing your boss up to take 10 days off because someone sneezed on the train last night. This is the problem, there are companies literally saying they cannot operate properly anymore, even some saying that if this goes on for long the owners might move businesses out of the country to somewhere not determined to test forever.
Furthermore what's stopping people being pinged one day, isolating for 10, going back to work on day 11, being pinged on day 12, isolating for another 10....
I hope you'll remember that should you ever encounter a situation where you are denied a service because most of the staff are at home, and not "with covid"....