Paraphilias in general often have an explanation based on stimulus association, it makes your little red rocket hard, we get that.
However there has to be a better explanation, think of it there has to be parts of your fetish being portrayed that you dislike, or don't see as hot. Start digging and understand your paraphilia mate, it is surprisingly deeply rooted with our own concept of self when you stop to think about it.
I just can't see any sexual connotation with it so it just feels stupid to see feet front and center(a common gripe of feet fanart for me is this instead of them being shown in either the background or as part of a more feminine vulnerable posture) on a normally tied character being forced into an scenario(something that actually ties to my domination tendencies, yet fails to arouse me in this setting) making this just seem fucking stupid.
Rationalize your kink, it might even lend you to discover what exactly turns you on and focus more on art pieces that hit all your soft spots, I refuse to believe someone would eat all art regarding of quality just because it showcases a fetish.
Also don't feel shame in thinking about it, at least tickling isn't deforestation or wonderbread shit.