I'm confused, shouldn't you then agree with my sentiment? Wouldn't you rather if guys would be more willing to go out with you as opposed to girls way younger than you? I agree that we shouldn't be pushing all young guys to get married but trying to stop girls from going out when they're younger doesn't solve the problem, you need to make guys interested in dating older girls. As you've expressed, there are clearly advantages to a guy to marry an older, more mature, and financially stable girl, we need to make guys more interested in those advantages. As I'm sure you're, unfortunately, acutely aware, single girls in our community are often "valued" less than their married counterparts even if they are much younger than them. It's stupid and a shame that this is how our community thinks but unless that changes it's very hard to ask girls to live in that reality for longer than they have to, especially coupled with the fact that older girls often have a harder time dating than younger girls.
If it would be the norm for girls to only start dating at, say, 21 or 22, then that would be considered young. There would be no younger pot to chose from.
Personally, I had an older sister and only started dating at 22 and it was the best thing. In my mind, it wasn't even an option for me to date before then so there was zero pressure.
I also know that when my brother was in shidduchim, the super young girls were always passed over immediately. My mother just was not interested.
I know many people do not think this way, but it can become more accepted and standard if people work at it.
Yes, I'm acutely aware that single girls have less 'value' but it all depends how you look at it. I don't care what people think and in my workplace (frum environment) I am valued even more because I am not havng babies constantly and leaving because my kids are sick.