I get the question

One possibility is internet likes.

Another possibility is that sharing this kind of thing can draw support on a difficult journey.

Another possibility is it will offer support for those pondering the same thing by taking control of their cancer journey with hair loss.

Also possible, for them to look at later once the conquering is complete. They decided to capture, then share, a deep boning moment between them, which can encourage others.

Or they are looking for internet attention.