If you automatically assume somebody approaching a child is a kidde fiddler (!) then your society has problems.

Yes. As a father of two (grown) children in the US, this is the default assumption for most men.

Your society needs help.

Welcome to ‘murica

This is America

There is zero chance I would approach a kid on their own that isn't mine. Because there is a very non-zero chance that someone would accuse me of that. If it gets to charges, even if I do successfully defend myself, then my name is mud and it costs me a ton.

I'd call security too. Not my monkey, not my circus.

Yes. In my "other life" I work in fire and EMS, and in uniform regularly have parents stop us and point us out to their kids - "If you're ever hurt or in trouble, you can ALWAYS go to these people, they're safe.", or the look of absolute trust when someone thrusts their sick child at you, hoping for you to make it better. And that, somewhat unsurprisingly, sometimes include seeing that child in undress.

Take off my uniform.

My partner spent several years in childcare, both at centers and as a nanny. We're out in public and she sees a crying child? She goes to it, talks to it, hugs it perhaps, reassures.

Me? Not a chance. For better or worse, societal conditioning is that that is something I as a male /do/ /not/ /do/. Because it's nefarious that I'd even want to.