Every school does that. All that says to me is "we're like every other school except we're all unattractive." Tell your sister to slap you for calling her ugly. Oh, and it also tells me you don't know what utilitarianism means.
We go to different schools...O_o
Not every school. Most school actually teach you the subject, rather than exam techniques for the entire year and exactly what to say during the exams. I know I can't describe it very well, but if you go to our school, it's completely focused on just exams. We've even been accused as just a grade intensifier, taking only those that pass an IQ test. It's not what normal schools are like.
I have been to normal schools with decent grades, and it's a much better place than what I have.
I know it says that it's based on giving us the maximum happiness, but happiness in their opinion is having good grades, and good grades is enforced via flooding us with work.