I sort of agree with the OP, although of course she is generalising.
The thing is, if people don't get married beforehand, how many people have these sorts of conversations (about marriage, expectations, etc) before getting pregnant? Even if a woman says "okay, well, pregnant now so let's marry?" and the man says "oh.....no...not yet....etc" or even if he says yes then changes his mind, are you seriously telling me that the woman would leave, even if she really wanted those protections? Of course not. And not when the baby is born either as she will rightly need the support. So basically they end up in a very shitty position.
I know a surprising number of women who have waited years for a proposal, and then decided to just go for a child, as they were keenly aware that their time frame for doing so was shrinking. It made me really angry to see their partners force them to choose that route for no reason other than their total lack of spine.
And yes, of course there are women who don't want to marry either. But are you really suggesting that overall it women who say no to men about marriage? Really?
How about: IF you plan to have a baby/have a baby, and intend to stay at home with said child for longer than your maternity leave covers (or say, more than 6 months), or switch to part time, or pick up more of the childcare to let your partner work longer hours and thereby sacrifice opportunities for promotion, THEN get married.
If you are one of the small portion of women who are able to maintain their careers pretty much exactly as was beforehand, with both partners working full time, then there isn't really any need to be married, if you are okay with the fact that you're not next of kin, etc.
If you are the main breadwinner, and your partner is STAP (Which let's face it, is fucking RARE), then you should get married to ensure that he has the same protections that people here are desperately trying to get women in the same position to wake up to.
Marriage as a religious institution really fucks me off. Yes, it used to be. I assume most people here are aware of civil weddings? I assume most people here celebrate Christmas in one way or another? Religious origin, quite obviously. I assume the vast majority of people here allow their lives to be dominated by the Gregorian calendar? Presented to you by a Pope, no less.
Pancake day? Shrove Tuesday. Another religious festival.
Almost everything has got a religious basis, as it's just part of our history. It's ridiculous to say "oh well, this one is now not religious because reasons, but this thing is still religious ergo it shall not dirty my precious hands - pass me the mini eggs".
I totally 100% disagree with the Australian system someone mentioned about co-habiting counting as marriage. To me that is just ridiculous. You can live with anyone! Flatmates can come and go like the changing seasons. Or you can live with the same flatmates for years. Living together is nothing. Literally, nothing. Unless both parties sit down and make a firm and lasting commitment to live together. There is no decision there. At no point have the two people involved sat down and said "Yes. I choose you".