Again, it's the Herald making a mountain out of a molehill to sell a few papers.
The policy does help make things easier. I could totally see a misguided non white ethnic family looking to lighten up the complexion of their child with a little donor material.
For those that haven't travelled, it's not uncommon to see products like this in parts of the world.
A policy like this takes this, or any element of "ethnic engineering" out of the equation.