Even we see some students who feel that they should be the rank holders and some students who feel that a pass is sufficient. All depends on the mindset of the individual. So if you have the urge to excel in your field of specialisation you put in hard and smart work and see that you attain your goal.
Definitely what we learn can be shared with others and we will not lose anything because of sharing our knowledge. In fact, by sharing our knowledge, our knowledge will increase.