Are you actually calling calculus useful? Almost no one uses calculus in real life. If you're not an engineer or a mathematician then you'll probably never need to use calculus.

Ever work in finance? or consulting? (elasticity rates are crucial in many fields, I spent my time determining ideal deposit) To a lesser extent, if you play games a lot of the engines employ rate changes. Additionally, almost all economics is based upon calculus and statistics.

Then there's the tons of trig and other advanced stuff involved in 3D graphics. You may not find a use for these things every day, if you have a boring job, but there are plenty of uses for them.

wtf? You need to most of the 12+ years of math you learned in school to be able to do calc and linear algebra!

Proofreading does not always catch everything... Often people will read their own work and read it how they think it is rather than what is actually there. This is why in school when they do peer editing and people switch papers... This isn't always the case and some people do catch their mistakes..but a lot don't. Proofreading may not have saved this.

So proofreading is somehow bad? Those of us in the big scary world successfully use it without having to "switch papers with the student behind us".

When did they say proofreading was bad? They said it doesn't catch everything and has its flaws. God, I hate when people assume shit and put words into other peoples mouths.