I used to wait tables and quite liked it. I believe it's one of the most important rolls in a restaurant as you're in direct contact with the customer.
Yes that is true, but a server cannot do their job successfully without the help of those who make the food or help in other ways.
Very true - it has to be a team effort. So long as everyone abides by the rules set by the manager, the establishment should run just fine!
That is very true. Everyone must do their part for things to run smoothly.
Yes. I once worked with a girl who did nothing while I polished silverware, restocked work stations and the like. She was awful!
Hopefully your work was recognized and she was not rewarded for her laziness. 
I was tipped a lot more than her - a major part of our earnings! Management eventually got rid of her, thankfully, and replaced her with someone much better.
That is good. At least you were rewarded for your efforts.