Happily married man here. I waited a long time to do it. One of the reasons not mentioned here is the family court and legal system that incentivizes easy divorce and is wildly biased against husbands and fathers.

Why would you want to get married if a woman can leave because she's not feeling fully satisfied that month, taking half your stuff, and potentially, getting monthly payments from you for life as well?

The family court system makes the trust barrier even higher and harder to get over today, and incentivizes women to end the majority of marriages, often for fleeting reasons of life dissatisfaction, which are meant to be worked through together.

Not to mention, the financial incentives to lower and lower-middle class women for having children out of wedlock are higher than ever. Our perverse welfare system pats mothers to have kids without fathers, or to leave a husband if they have one. These reasons need to be mentioned and addressed as well.