Nigga, have you been around women who are still in their teens/20's? It's literally like talking to a toddler thats somehow legally considered an adult. Young men aren't much better, especially these days. Bunch of empty headed weedbro's that literally can't tell their ass from their elbows.
Age gaps are important because you can't have a fulfilling relationship with people who are mentally children (comparatively speaking to your mental age as the much older person). I'm not saying absolutely everyone below the age of 30 are drooling mongoloids who can't even comprehend how dumb they are, but a good fucking deal sure as shit are. Plus, you know, you're a generation or more apart if you're not sticking with the golden rule, that makes it even more difficult to relate to someone you're seeking a relationship with. If you struggle to relate to someone on even the most basic levels, you are not going to be compatible. Same goes for a 50 year old and a 30 year old, the gap is too big for the likelihood of a healthy intimate relationship because there's such a massive difference in life experience and generational upbringing. Though if I'm being fair, a 30/50 couple probably has better chances than like a 30/20 due to both being past the point of "mental maturity" and both likely being more "grounded" into their lot in life. Younger people tend to be fickle or trying to chase that dream, relationships tend to be secondary for a lot of them.
Then there's the argument of "power dynamic", but that's a different argument imo. If a 20 year old and a 70 year old (with their cognitive functions in tact, CHRIS) agree to fuck, thats their legal right and I can't stop them. I sure as shit can still judge them for it though.