I don't think this is so. We can observe that more and more people are postponing marriage until after the age of 30. Surely in some cultures what you say will be taken into account because there is a tendency to prefer women to be young in order to procreate. In this sense, older women are not seen as candidates for marriage because they have lost their fertile stage. Young couples are more full of vitality and therefore with a higher probability of life to get into the great project that is marriage: having children, buying a house, among others. However, as I said at the beginning: more and more couples have marriage as their last option. They decide to get married after studying, traveling, being professionals, even after living together for a certain period of time.
Perhaps they are advised to marry young, when they have lived the least, because if they get the taste for singleness, they never get married.
I think there is a sweet spot in this. Not too young and not too old. This question has a varied answer. It is better to get married when both are responsible enough which is not 15 years of age or 13 in some cultures which is acceptable. Well, I guess, there are some cases which I have seen where the guy who was still schooling accidentally made his girl friend pregnant and they had to get married early and I have seen that they are still married till today. However, in many cases I have seen couples who got divorced due to not knowing each other well enough.
Getting married early also has a good side. Imagine being parents at 25. By the time that we reach 40 our kids have already grown to 15. Another few years and they are adults. Still got some time to go traveling and all those.
Marrying early is not advisable in a modern society. Far from it. Young adulthood is a period in life when you supposed to find your place in adult society and that is more complicated and difficult than ever in today's society. It is a time when you should try out things, go to school, try your wings in business, relocate if necessary to fulfill your ambitions and get ahead in life. Marriage is for established people who've found their place in adult society and who have stable careers. Why? Because people marry to have a family. Taking care of and raising small children is hard work and will easily stop you in your tracks if you have ambitions that demand a lot of your time, effort and attention. Even if you did not have children, you might not be able to relocate if you got a lucrative job offer in another locality. And if you already have a child, your expenses are much higher than if you were a single childless person, which may make it impossible go back to school if need be.
Marrying early is problematic also because you don't know yourself, yet, and are probably not a very good judge of character because of your lack of experience. There is a good chance you might end up marrying someone incompatible. In fact, marrying very early is statistically a risk factor of divorce.
Some of the advantages of marrying early are: you take on responsibility early and avoid reckless lifestyle, you have your kids early and all of you will grow old together, you experience the joy of martial bliss early, etc. It's always very cute seeing a 55 years dad or mum already having a grand child. Sometimes, when you see them walking with their own grown up kids, you would think that they're siblings. Marrying early has lots of benefits if you marry the right person.
It is because you will not have romantic mood at a later stage or when you become older, everything has a time, so as having romanticism and having sex. That is the theory of nature. Your hormonal secretion is at peak during that time and that is the time you should marry, have romance and have sex to your full capacity and with absolute satisfaction for both of you and later when you will have baby, you can become responsible, work hard and build the future of your kids and take care of your family. It is as simple as that.
So that divorce and remarriage can be done earlier
I don't think so. If you find the right person then yes but there should be no pressure on when one gets married. If you are ready for marriage whether you are 20 or 30 it doesn't make any difference.e