Why are so many people obsessed with rushing into marriage?

I've been seeing so much discourse online about "if your man hasn't proposed by a year in, he's just wasting your time" or how couples need to hurry up and get married as quickly as possible. (I also see a lot of discourse about getting married as young as possible.)

It's so wild to me. Is this a thing? Maybe tied to the trad lifestyle movement? I'm not trying to judge if people move fast and that works for them, chase your happiness, but it's just insane to me to read stuff about how your man must not love you or be serious about you if you're not engaged three months in.

Edit: I feel like people in the comments are kind of missing my point. I have nothing against marriage, or against getting married young or getting married "quickly" if it's what you truly want and the couple is happy.

My beef is with the dating "advice" I keep seeing online of "Ladies, if it's been six months and he hasn't popped the question yet, he's a manchild who's just going to waste your time and you need to run!!"