Part of what it points to is what you’re currently paying attention to. You don’t notice all the people who aren’t what you consider “good looking”.

Later in life, you’ll notice how many people have children in strollers, or drive fancy cars, or can afford houses. You may start noticing how many people own dogs, run regularly outside, or never look up from their phones.

It’s a form of selection bias; you tend to see the people that are most likely to catch your attention, and ignore the rest.

Try an exercise: start checking to see how many people you see in public smile with their eyes.