Point of contention. Mother Nature didn't remove them through evolution because they weren't using them, but as the eyes didn't provide an evolutionary advantage the trait was less likely to be passed down to future generations. There was no active process to remove the eyes.

This may seem a small distinction, but it is an important one. Human intelligence still provides an evolutionary advantage. Intelligent people will be more likely to live long enough to reproduce and their offspring will be more likely to survive to adulthood to themselves reproduce.

If anything, you should be more worried about medical advances that lessen that advantage. I'm not saying we should stop trying to save every life, but when you lessen the advantage intelligence provides for survival you increase the likelihood the trait could be lost.