Let's not pretend that if you're a parent you're not going to do everything you can to help your children succeed. Life isn't fair. Having parents that are doctors can give you a slight advantage in medical school admissions, but life isn't fair. What high school you go to, what mentors you have, what financial resources you have available, your temperament (which is mostly genetic), how physically attractive you are, or whether or not you happen to have a physical ailment, disability, or disease affect whether you get into medical school in unpredictable ways, both major and minor. Life isn't fair, but we're not making it any more so by sucking the joy out of ceremonies that give parents a chance to be proud of their children and children to feel like they've achieved something profound in the presence of their loved ones.
I say all of this as a first generation medical student that overcame a whole hell of a lot to get here and that paid his own way throughout. Yeah, I had it rough, but being bitter at those that didn't does absolutely no good for the world.