Genuine advice is often coloured by a person's own bias and experience, and if another takes it without taking that into consideration, they will be misled by the same faults.

In this case, the advice about baldness is a joke based on a negative stereotype for baldness, and not genuine advice at all. The default response in this post appears to be along the lines of preventing or reversing hair loss, showing support for the stereotype, and that people are taking the content at least a little bit seriously. I'm just here to say this particular piece of 'advice' is misleading at best and harmful at worst. Baldness will only affect your happiness if you let it.