Exactly. Like I said before, antivirus is meaningless if the user does not practice good behavior. I simply don't believe that any AV software will catch all infections, and it's up to the user to not be foolish.

I have one family I do work for that has two teenage children. I've often said that a good 25% of my business comes from the crap that teenage boys do on their parents computers (don't think about that too much).

I've been to their house three times for three different computers due to viruses. This last time I insisted that they had to switch to Chrome, use MSE, and described the kind of virus warnings they can trust.

All that said, I think AV software is good for catching the stuff that falls through.