I'm pretty sure that you have misunderstood the definition of fetish.
A person does not have a fetish involving everything that they have fapped to.
I don't have a fetish for 30 year-old, big-booty redheads in pigtails playing the role of naughty schoolgirls. But I can fap to that.
I don't have a fetish for interracial sex. But I can fap to that.
I don't have a fetish for chicks getting double-teamed or gangbanged. But I can fap to that whether they are in bondage or not, no matter what race or nationality they are. It doesn't matter if condoms are being used in the porn or not, or if the penises of the male talent are big, medium or small.
So there's no possible way I could have a fetish for any or all of those things, even though they all were fapped to at some point.
Now, if I said I can only achieve sexual gratification when a petite older Arab-looking lady is receiving golden showers or something like that, then we may be able to find an actual fetish at play.
Anyways, I still just can't see myself being so against anything just because some people have sexual thoughts and proclivities concerning that specific thing,
I also don't understand describing people's sexual desires concerning things like anthropomorphic creatures as "creepy" or anything of the sort.
I could not care less if a person is sexually or non-sexually into anthropomorphic animals, or any other specific interest. I don't care that people are "sexual deviants". I don't see what is supposed to be so wrong with being a sexual deviant in the first place. Most of the time, as far as the vast preponderance of humanity is concerned, it's none of my business, doesn't affect me, and would be a silly reason for me to start actively disliking any certain aesthetic or activity.
Lucky me, I guess,
I'm free to either like or dislike a game with anthropomorphic animals in based on merits such as "is it fun?", "is it annoying in some way?", or just, basically, "do I like to play it?".
TL?

R? - Anthropomorphic animals do not influence my buying decisions, and while I can see how some people may be more inclined to buy a game with such characters in it due to their interests, I find it pretty strange that so many people avoid those games because they apparently can't stop thinking about people fapping to animals with people-like qualities and wanting to have sex with people who wear animal suits.
Also, fetish is not a word to describe everything that any given person has fapped to.