Yeah I sometimes worry that we will be creating a much more fragile human race because of modern tech. Will C-section over thousands of years cause us to be unable to procreate naturally. Many genetic abnormalities that used to mean you die now easily allow you to reach the age you can have children, keeping those genes in the gene pool. It's kind of scary.

And I say that as someone that would have died the first day on this earth without modern medicine.

On the other hand there is a good chance we master genetic modification to such a level we could just manually fix our genes.