system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it so hard to cure baldness?

What exactly are the challenges that make this such a difficult task, despite all the other amazing advancements in medical science?
gpt
our current advances in medical science excel at repair. if you broke your leg, we can easily repair it. if you cut your finger off, we can likely repair it with some luck and skilled surgeons. what we cannot do is grow a leg or finger back. on a similar vein, we have products like rogaine that can be used to maintain the current hair follicles but we do not have the tools to grow them back where they've died/atrophied (apart from a hair follicle transplant).