It gives the setting more consistency those are racial distinct features if one dislike such feature why chose that race in the first place? It is not like everything must look varied as humans. Otherwise what could stop me to make a white skinned Ghitianky that looks like Jhonny Depp?
It makes the setting more coherent and it create diversity among the race that contains. If everything would look the same what is the point to make a different race from the humans. Let's just make all humans.
Pretending a not Human race to have Human tracts is quite well... A pretense.
1) How does it affect your enjoyment of the game that other people are given more customisation options that you are not required to use?
2) Are you against the current customisation options that allow you to make characters with any combination of skin, hair and eye colour?