I think - just like sexuality, our fetishes just are. I think the choice lies in how we express them and what we do about them.
I also have a theory that some fetishes are based on things/events/lifestyle at the time our sexuality was kicking in - e.g. my "thing" is voyeurism - strangers getting changed in a locker room - open showers etc - i'm not sure if it is coincidence or not but my sexual awakenings coincided with more school swimming trips, sporty club stuff etc - i also love speedos lol and love seeing men's feet (not kissing etc just looking) - so to me it all coincides with that time.. so i always think "was it i got lucky at the time or did it sort of manifest *because* I was around that atmosphere?"
I look at it like this. Fetishes are easier to not act upon, or only slightly act upon. E.G. A middle aged 60s housewife who was actually a lesbian may have had a fair bit of torment/confusion but a 60s housewife into bondage will not be crying herself to sleep over it.. if that makes sense ?
As sexual liberation has changed/gone forward, I think we are seeing the stigma of most fetishes fade or at least not be so
- there are some glaring exceptions - scat is an obvious one
if you are not - like you say - attracted to men's feet then so be it.. i think bondage is interesting but my pain threshold is -20 lol - in other words we are all different.. makes it fun