Poor Yorick - next of yin? What do you mean by that? It doesn't have any particular legal meaning in the UK.
Correct, but it's a useful term for matters such as contact for medical professionals and the like. They'll usually assume it's the nearest blood relative, or spouse if you are married. If you're not married, you can still name your spouse as next of kin, it's just that they'll probably make the assumption if you are.
In many other countries, NOK is a legal term with various implications, so it may or may not serve your purposes to be married if you're planning on travelling or moving.
If NOK were the only benefit to being married, no, it wouldn't really be worth it for most people, but it's only one very minor part of it.
I think marriage should be mainly about love!
Legally - and it's nothing but a legal contract - it is not, whatever you think it should be. You cannot legally contract love. All you can do is legally recognise a relationship.
Which is why unmarried people are entirely right when they say they don't need to get married to prove their love. But wrong when they imply that marriage is not intended to serve any other purpose.
The answer to me is to FIX THIS. Not to tell young women to find a rich man.
Absolutely nobody on here has advised women to marry men based solely on their wealth, and absolutely nobody has suggested promoting marriage instead of fighting the pay gap. That is ridiculous.
What some of us are saying is that, given our current situation of unequal pay (not 'in the past' at all, I am afraid), a lot of women will be better protected by being married before they have children. Not all, of course not all. Plenty of women on here are unmarried for very good reasons. But already there have been some who are unmarried for very, very poor ones, such as 'well we don't need to prove our love and I can still change my name'.
Also, many people are focusing on relationships ending and forgetting that people can also die.