What is the point of baldness?

[He's here!]

When I look at old pics of male relatives on both sides of my family and see the number of bald heads on show I realise I was fortunate to inherit whatever gene my dad possesses which has enabled me to hold on to my hair well into middle age. Some thinning starting to creep in now but I can live with that. Not at all sure I'd have coped so well had it started when I was in my 20s tho.

What mystifies me about hair loss is its randomness. If it was something that accompanied old age/decline I'd see some logic in it, but clearly it can afflict perfectly healthy folk at a very young age. I just see it as an unnecessary and unfair hindrance (and something that can really get people down). What is the point of it?