I used to feel the same way when I was at school. I always thought it was stupid to have to remember so much and then write it all in a timed environment; I mean, when will that ever be useful?
Now I have a job I feel completely diffferently. I cannot stop working to look each thing up, it would really affect my productivity, I'd never get anything done. Not to mention time constraints. My boss emails me to do/send him something. I can't waste time looking it up, I have to know how to do it and how to do it within a reasonable time frame.
I understand your frustration - but it's important to recognize these are transferable important skills.