Well, you're definitely not living on the same planet I'm living on, having been told of numerous occasions involving J* flight cancellations due lack of crew.
Maybe you live on a different planet to the rest of us. My sources tell me that no flights at J* have been cancelled as a result of lack of tech crew. Certainly some flights have been cancelled due wx disruptions and an inability to launch with standby crew due to curfew requirements. "Flights being cancelled" is merely propoganda being spread by the "pilot shortage" brigade, more wishfull thinking than fact.
It will be interesting to see which party plays better poker later this year.