Listen, I am fundamentally in agreement with you on that. Better be safe than sorry!
However, there are a number of other factors that play out, and some of them we don't even know from the OP:
-Interdiction, per se, is not lethal. So is not like pointing a gun at you. Is rather coming with shackles at you. So, not so similar to a gun.
-Yes, you have heard about the griefers, and if you were in Mt Everest, you probably would have also heard about the Rangers there. And it so happens one of them has an Anaconda.
-The chat communication is important. What was said -or not!? -we are on the blind here
-The distance: from the radar picture, this guy was nowhere near to be interdicted. In fact, so far, you can barely see it, if at all.
My point being that those conditions create a rather ambiguous situation for few seconds that requires sound judgement. Probability of being danger is one outcome and better be safe. But IS NOT the only outcome, nor should be the only assumption, after the fact.