Okay, sure, let's say the only reason kink and kink gear have ever existed or could ever exist is for boning. So? Who cares? Lingerie exists primarily for sexy reasons, but no one cares about lingerie commercials. Even things as mundane as wedding rings imply that those wearing them fuck regularly. People only care about leather harnesses and pup masks because they're weird. The sex bit doesn't matter. Sex is shoved in our faces all day every day by advertisers, and heavily implied by many of the social signals we send one another, yet it only becomes problematic to most people when it's implied someone is doing a sex thing they find strange.

I don't think you're weird at all. I think you are, tragically, quite normal. Your attitude is a pervasive one even among people who really should know better. Like, for example, gay furries. And there are any number of queer kinksters out there who think furries are disgusting zoophiles flaunting their fetish in public whenever they wear fursuits. Sadly, vilified subgroups often hold the exact same prejudices toward one another that outsiders hold toward all of them. Why they can't see it's all the same bullshit is beyond me, but there you go.

Your personal feelings of disgust are not a basis for morality. You are, naturally, perfectly free to not respect people who wear kink gear in public. But I think that's pretty inexcusable. Harmless but weird behavior is not a good reason to disrespect someone. But perhaps the more salient point is that anti-kink rhetoric is nigh indistinguishable from queerphobic rhetoric. Both equate feeling uncomfortable to being harmed, and both are used to bludgeon people into conformity with social norms. You may think you are expressing a harmless opinion, but the fact is that whenever you complain about kinky people daring to exist too loudly you are reinforcing the precise kind of thinking that will be turned against you by homophobes.

What's the difference between you seeing someone in a pup mask and immediately envisioning a BDSM orgy and a homophobe seeing two men kissing and immediately envisioning them rimming each other? Both actions imply the people involved may have sex but do not guarantee it. If you can't look at someone of a certain proclivity without imagining them committing sexual acts you find vile, not only is that you problem, but the revulsion you feel is identical to the revulsion a homophobe feels toward queerness. Identical. I hope you think about that.