I think you are right. Men or women past a certain age do become invisible to many. But, I don't think "youth" is the only culprit here. You can't ignore energy in people no matter what the age. Many people who reach a certain age settle into an energy-less state of mind and body, hence they are often ignored.

I don't mean that being visible requires jumping out of airplanes, bungee jumping, or trying to look or act young when you aren't (chronologically). I find that aspect of seniors trying too hard to be young rather embarrassing for everyone.

If we really own who we are at any given state of mind or body, it's impossible to become invisible.