Did you see this from your home or were you on the street? How do you know they were 'genetically perfect'? How close did you get to them? The scenario, including the lack of details in your description, is kind of weird.
I agree, it is kind of weird.
but us, as species are perfectly capable to detect many genetic traits, mainly for mating purposes. Some of those are really minimal distance and proportions. This kept us alive for milions of years.
Are you sure? I don't think it is as easy as you proclaim it is.
Why not find out more about this on our own? Shouldn't be that hard if we had more facts.
Yes, that should always be the first thing to do. I would be willing to bet, if you would invest a bit of time and energy by looking at the whole thing with a critical eye and do some investigations on your own, what happened could be far less strange than you might think. For all we know, most often things of that nature turn out to be rather mundane. In fact, it is always a good idea to assume something rational first and approach/investigate it from that angle and not the other way around. If there are still doubts after this rigorous search for rational explanations, the experience is more likely to be something odd or exceptional.
One easy thing you could do is go there again during daytime and ask locals and church people what that could have been.