Please, I think people are making too much of a big deal.
I love blue eyes too, like erika said, give the horse a unique look, and personally, I feel like I could drown in they re eyes
Dogs and cats are different,
Completely white cats that have blue eyes will tend to be deaf,
My sister found a baby cat baby my grandpa garage, abandonned by his mother. He has one blue eye and one green, we realized that he was deaf and probably why the mom left me.
For dogs it depends, I know white german shepherd will tend to get more health issue if they have clear eyes... its probably a matter of genetics for sure!
My husky has blue eyes and so far she hasnt had any issue, perfectly fine but she s not completely white, so not consider albino