When any hypothesis is taken, the method of bringing the result of the hypothesis also taken. There are many methods for proving the hypothesis. As humans take a long time to reproduce and develop, for proving the hypothesis, the scientist should find a new method.
Examine a genetic disease in humans is very important because it can help humans to find a way to get rid of the genetical disease in the future.
So, it will be better to develop an alternative method to get the result of a hypothesis rather than give up on testing the hypothesis.