The bigger question is when you face this in your work environment from peers, subordinates, and patients, how will you handle the stresses of those often unfair social situations? Dentistry requires thick skin as most patients don't want to see you besides for routine maintenance. Imagine being in a work environment where a lot of people don't want to be there but have to be there, not because of who you are as a person, but because of previous experiences, stigma, and so on....
Prove them wrong and succeed. That's the best you can do. The cherry on top is if you can make more money than all your classmates and whoever is bullying you.