Why is blue for boys and pink for girls?
Why should we stop at red and go when it is green?
Why should man have short hair and women long hair?
Why do we lock things turning clockwise?
These are all conventions. They have no sense at all, in spite of the fact that they do have some historic origins.
That is the same with chess and go, someone someday decided that one coulor should start. The reason of the chosen coulor may not make any sense today.
I just watched this youtube video where Black goes first............................................ in GO.
GO has been around for 4000 years.
Why does White go first in chess? Did someone get it wrong a long time ago, and Black really should go first?
This is but one example of what challenges my mind on a daily basis.