The thing about commies is that they suffer from soemthing like object impermanence. The moment you create a cure for cancer, the cure "just exists" and the only remaining question is distribution. Likewise for food, shelter, etc.
To become rich from curing cancer, you have to withhold the cure from people suffering and dying from cancer. So yes, you don't deserve to get rich from curing cancer. Only in an exploitative and unethical system is this seen as acceptable.