Teacher here. Teachers are idiots because only and idiot would be a teacher with the current economical situation.

There's the "good" teachers, who accept that teaching is no longer a real, important job but has been declassed to extra side money you could hardly make a living of. But they're becoming less and less, as most of them are smart enough to move to profitable jobs. I've had to work as a store clerk to keep teaching. How many people accept that, instead of just finding a better job to use their hard-earned degrees?

Then what do we have left? The bad teachers. The bums who teach only because they couldn't find a serious job. And so, these scenarios happen more and more.

I blame public schooling for this. Getting everyone to have access to an education was supposed to improve the lives of everyone, on paper... but in reality it turned schools into the lowest common denominator. Because students become customers, and when you have to appeal to the masses, you get this.