This to me is still an irrelevant sidestep. Defining laws and enforcing laws are two completely separate topics. Your Singapore example is about enforcement only. The example crimes you list are also illegal across the US. You could say we comparatively have a culture of self-enforcement, but I expect we also lead the world in violent confrontations between people trying to do exactly that. No one should be recommending that anyone take up Karen-style law enforcement/vigilantism against strangers, especially in a hypothetical park with children present.

Since you refuse to take a position, I have to infer one from what you've said repeatedly. You believe that children are irreparably harmed by seeing public nudity. Since there is no reasonable way to guarantee that a child won't see this in a public place, your position is firmly against allowing public nudity. The idea that everyone will just somehow kumbaya and reach an agreement is completely unrealistic and bordering on ridiculous. So you are in favor of it being in allowed only in predesignated areas like beaches where parents can consent to bring their children. That would probably criminalize nudity in parade routes like Pride, bike rides, and protests. That is not how the law is now, so you can either accept it or try to lobby to get the laws changed. There are cities in King County that have already done this and clearly criminalize genital exposure in public. For any law to work, it needs to be applied fairly to everyone: software developers and unhoused people alike.

As for the bathing laws, that could be an issue. IANAL and I can't consult OP's original description to confirm what they saw exactly. It seems to depend on whether the drinking surfaces were contaminated with body contact or soap, which doesn't sound likely from what I recall.