The first watchOS version that had this monitoring built-in seemed to be prone to false positives. However, the watch first asks you if you are ok and if you do not acknowledge so in a few seconds, then it dials out.

Right. The other day I accidentally slammed my watch into the wall and it started asking me if I was OK. You have a chance to say that everything is fine and that you don’t need help before it starts calling emergency services and telling people you’re in trouble.