From an evolutionary point of view this could have made sense 200 years ago when the lifespan of a human was 45 years.
Our bodies are not perfect and we have been able to understand and to certain degree fix many issues with it such as infectious and cardiovascular diseases and some types of cancers.
For example we never saw polio as a quality control system for our species.
Our understanding of infertility and methods to treat it have remained unchanged for decades.
We basically pump an awful amount of drugs into a woman's body hoping to harvest a few good eggs via surgery.
It is a brutal and painful process, physically, emotionally and financially that most times has very poor odds of succeeding.
If we can do the same with a few drops of blood, removing the drugs, the cost and the randomness of the current procedures while increasing the odds 10x, this would be an amazing feat of science in a positive way.