Is the human body still a mystery?

According to the coach, yes. A huge one.
The human body surprises the coach with its wisdom every now and then.
But the coach also often sees how many things (according to the coach) we do wrong. Things that seem obvious, which we have taken for granted (whether in sports or outside of them).
For example:
Washing your head and hair with shampoo. An action that is already obvious to us. But in reality, it is an action that removes the natural protection of the scalp and hair with a caustic substance.
Hygiene and body care are beautiful, but how to do it well?

Are two people on a desert island, without shampoo and soap, supposed to kill each other? Are they supposed to be disgusted with each other? Are they supposed to stink?

This is probably not how humans were created.
This is hardly how any being on earth was created.

There are many examples. The point is (referring to the example of hair) that when fighting hair loss in adults, you do not necessarily have to discover the gene responsible for hair growth. The error may lie closer than we think.