There is some truth in this thread but you also must realize that men who are here on SS as a generalization are jaded to one degree or another due to failure of a relationship or relationships in their life. Others plan to be playas indefinitely. That is not a criticism but just the way it is. As such you should expect that the advisement you see here to be jaded if you are looking for advice on how to be successful from men who haven't got what you want. From men who largely do not subscribe to any belief in a concept like "The One".
There are some happily married men who come here and there are plenty of happily married men in the world. They aren't on a manosphere site too much. So understand the filter through which your information is coming.
@Desdinova has his theory about High Score Theory (which I find interesting and can see truth in it for a high percentage of women - but not all) and I do agree that the younger you find a good quality girl to bond with the better your chances for success (that part of his theory I do agree with for young women).
There are men you can look to as examples of having a successful relationship that you can look up. Look at biographies of the following men:
Roger Staubach
Robert Kraft
Ray Bradbury
Ronald Reagan
Jay Leno
Johnny Carson
Steve Jobs
These are guys who have or had successful marriages. Google them and Google the Mrs in the equation too. They are not the only ones either. You need to focus on yourself and being the best man you can be. If you find the right woman to be by your side while you are out accomplishing things in the world then you will have someone who is on your team to help you along the way in your life. To find someone like this you must focus on inner character qualities even as a higher priority than beauty. You can find both, especially if you are young, but you need to evaluate women from a mature standpoint and put quality of character FIRST. That ain't easy.
Men who get the woman in their life right along the way early are set up not to be distracted by women later on. This allows for greater focus on accomplishing life ambitions, which is really what men are designed to be doing.
I may get totally flamed for this post and that is fine. I'm a woman and old enough to be your mom. I'm also happily divorced and raising a teen son (in addition to a couple of daughters).
I totally subscribe to the second half of Proverbs 31 (from the Old Testament in the Bible) which addresses the Wife of Noble Character. It doesn't say the Wife of Great Beauty (although you can find both, with a greater potential for success at your age than any other time in life).
So just understand the bias of this group (or any other group or individual to whom you pose such a question) and keep becoming your best self and learn to value yourself and keep your own counsel.