Teachers offer a second, more experienced, set of eyes to spot my mistakes and correct me, and if I don't understand how something works or what to do, I can just ask the teacher.
When I have to do it all myself, I can't spot my mistakes as easily, nor do I have anyone I can reliably ask if I don't understand - just futilely try to look it up online.
I also have more motivation to learn with a teacher, as if I procrastinate I not only disappoint myself in the end, but also the teacher - and independent study just inevitably ends up frustrating me, causing me to quit earlier than I should.
So yeah, teachers can be amazing, in my eyes, far better than any other form of education - if the teachers aren't overworked or don't have awful personalities, anyway.
Oh, and multiple 30-45 minute classes a week, almost every week? That's so much better for memory retention and actual learning, than one hour-long class a week for twelve weeks.
The basic school system, at its core, is great for education; it's truly unfortunate the people involved tend to ruin it, a lot of the time.
That is what I like about uni, there are always recitation sessions with grad students and undergraduate teachers so you can have the chance to ask questions in a smaller setting, as well as office hours which are way underutilized
When I was an undergraduate teacher maximum 3 students would show up to my office hours
When I have to do it all myself, I can't spot my mistakes as easily, nor do I have anyone I can reliably ask if I don't understand - just futilely try to look it up online.