This debate is just going around in circles...
Can't we just agree that tutoring is not essential but can be useful to certain students to varying degrees
Moral of the story : if you want a tutor and feel like you will benefit, then get one
If you don't, then don't get one
And agronaut, you can improve on your own, without the help of a tutor - its not about arrogance, its about realism - if you know that by working hard through the content, doing practice exams etc. is enough, then why would you get a tutor?? You just have to be honest with yourself about how far you can get on your own (with your classroom teacher)
I think the best type of confidence is going into an exam, assured that you have done the best you possibly can, hope for the best but prepare for the worst
And there are many cases of perfect scores - even here on AN- on a subject with no tutoring