Knowing how to operate equipment and understanding how to troubleshoot it are very different things. It's exactly why IT support, car mechanics, or electricians still exist.
Some people think that knowing how to use a computer makes them experts, then they start spreading that "knowledge", and IT support ends up with all kinds of seemingly stupid calls where someone is (or took the word of) such an expert. Other times people just want to be helpful and play back what they heard from the IT personnel during the last case because that appeared to be similar for them, even if the issue was radically different.
While that's certainly true, there's plenty of stories out there (and I've experienced a few myself) of people who just refused to use basic common sense, reading comprehension, or understanding of physics 101 when dealing with computers.
If you're going to be lazy keep dropping dishes while you wash them or send the lawnmower over a big brick.