Something very important to consider.
There is nearly no place to meet people, if you don't meet someone at work or school it's nearly impossible for most guys to find a woman somewhere. And the people are work/school are going to be a similar age which is not good.
Online, such as instragram msgs, or dating apps is the only chance some people have is what I would say, but in reality most people have no chance online either. Here's the gist of it.
An average man will get 0-5 likes over MONTHS with no matches, 1 if he is lucky. But most of his likes will be from bots.
An average women will get 100+ likes in 5 seconds, within an hour easily over 1000 likes.
If a man is dating a woman, she can at anytime take out her phone, press a few buttons, and she has another 1000+ men to pick from, meaning she will always be able to find someone better (except that better person isn't going to marry her). This kills the relationship dynamic, because now the woman has the power to leave at anytime believing that she has a backup, and technically it's true, just she will neither consider the average looking guys because there are plenty of good looking guys who want a night of pleasure and are willing to use her.
Most women do not understand how bad online dating is for most men. The amount of choice for each gender is day and night, like a desert vs the ocean. This divide is very important and cannot be ignored.
A big red flag in my book is if a woman has ever used a dating app.