I loathe this attitude. I'm a teacher, and I decided to teach because I (thought that I) enjoy teaching, not because I couldn't be doing something else. This is true for several of the teachers I know. I know some who passed up on being doctors, or lawyers or other professions to become teachers because they enjoyed it, and liked doing it more.
Yes, some are stupid, but you're painting with broad strokes and, honestly, it's not easy to see why we have a cult of anti-intellectualism in America because of how common this attitude is. A lot of them have thorough knowledge to explain something, but the student doesn't yet have all the requisite knowledge to understand...Like when someone asks me why, when we study perpendicular lines in Algebra, it has a negative reciprocal slope. They don't know trig identities; they're not at a level to understand the various proofs behind it. So when I tell them not to worry about it, that doesn't mean my knowledge is "shallow".
It would be nice if doctors became doctors just for the joy of helping people, not all the money and social status. Teachers work with difficult kids and put in the time to make the world a better place with zero pay [if you factor out cost of living].
There are a lot of people out there who did great in school but never learned to think for themselves. Some of those people are now saddled in debt and don't have the skills to dig their way out.
A better lesson would have been that teachers are a resource. You can go to them with questions when you're stuck. You can use them for guidance. College professors especially.
I was always encouraged to go to school. It's important they said. You need it to get a good job.
BUT! The teachers are stupid. Don't trust them too much. They dont know everything. If they were really that good, they'd be doing it, not teaching. Always question what they tell you, verify things on your own. If something doesn't make sense, speak up and get them to explain. You'll soon see how shallow their knowledge really is.
And don't worry. You're never gonna need any of this in real life. Grades are important! Get good grades. But also don't worry coz nobody is gonna care as soon as you're out of school.
Mixed signals right?
I never graduated and I like to think I got everything I needed out of college except a piece of paper.
PS: In high school I was everyone's worst nightmare. When I was engaged, I'd ask a lot of questions and derail the instruction. When I thought your subject was stupid, I'd just not participate, avoid any and all homework, and get straight Fs.
The straight Fs in particular had to have been frustrating to teachers because I'd then learn enough of their entire year's worth of curriculum in 2 weeks to get a D and pass the class.
PPS: My mum eventually did go to college when I was in college. She graduated before me. Still says it's useless IRL.