If he is a young spry athlete, he probably lunges and kills you if you let him too close.
That was not the situation here.
I just wish they would use a little more discretion. There is a difference between a bad dude with evil intent and a depressed or mentally ill possibly suicidal person. I remember years back there was a story about an elderly lady, or maybe it was a guy don’t fully remember, was in a wheel chair and no threat but because they wouldn’t drop a knife on command they were shot. (alzheimers or something I don’t know) but that showed if you just disobey police orders they can kill you. This shocked me at the time.