When mountain lion were extirpated from their former range it was “unusual” for attacks simply because they didn’t exist. Anybody tells you it is unusual for a mountain lion to attack humans is misinformed. We humans may not be their first choice, but this notion that it’s somehow rare is nonsense. Again, it is rare to be attacked if there aren’t any around, but that’s not quite the same thing is it?
I recall reading of a deadly attack from a couple years ago and the article actually said “authorities are searching for a motive for the attack”. This is the idiocy normal people have to deal with these days.
“We found clothing. Human clothing.” That’s a quote from a sheriff’s deputy on a search and rescue some years ago in Oregon.