Genetic inequality

I feel sad about what nature gave me. People say it all depends on the effort you put in but that's only true in part. They say nothing is impossible but again, that's true in part. If I tell them that a short person is aiming for a 2 meter jump they understand that it will be impossible. The problem is, they seem to be unable to connect the dots and extend this line of reasoning for anything else. I'm not going to connect the dots for you because I'm at a loss for words since my communication skills seem to be terrible. English is not even my first language. In fact, I apologize in advance for any mistakes I made in writing this. Anyway, the world is big and there are plenty of people that understand. I hope to find somebody here that feels the same as I do.