Why do people still try to use the fool's mate.

I'm pretty sure everyone who plays chess would have been taught or one way or another come across the fool's mate. So there is no point using it for someone because you are already losing the game from the beginning. In a way.

I never taught it to my students for the simple fact that they think it works all the time, and they quit studying what they need to learn.  When they did run into it, we would go over the "why" behind it.

Sure everyone knows it?

The first time I tried when I was little I realized that it was hard just to get them to go in to place where I could use Fool's mate of them

Are you sure it is Fools mate. Or is it Scholars Mate? 

This ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

fools mate you do to yourself, anyone with the opportunity who doesn't play 2...Qh4# when given the chance is the fool.

Scholars mate involves giving yourself a bad position with the hopes your opponent wont see

Now that I think about it the names aren't very suiting

People use it for a quick win for rating and the disadvantage you get from someone who counters it with tempo by attacking the queen and developing pieces while you are moving one piece multiple times in the opening is only a positional edge at best for your opponent so most beginners can't capitalize on it. 

I'm average rated across the board and I haven't had someone try the fools mate on me for years now. 

It's really only something u see beginners do. In terms of chess.com ratings, once u get past 1000 rating zone, no one really bothers trying it.

In all the years and hundreds of games I have played, I have never had an opportunity to use the Fool's Mate. Scholar's Mate many times, but never the Fool's Mate. Teaching it to beginners would be more of a preventative measure.