"Some men obsess about romantic relationships because for guys it's likely that the first real friendship they ever had was in the form of a romantic relationship." Is this true?

I have always wondered why some guys seem to put so much emphasis over getting a girlfriend. I read that one of the reasons is that men confuse friendship and romance. The first time many guys feel comfortable to be his true self, talk about his feelings, let his guard down and actually be accepted and supported is in a romantic relationship. For women this is something that is very normal with friends and family members to different degrees.

I'm wondering if this rings true in this community. And if so, would guys feel so strongly about having a romantic partner if they could be vulnerable and felt supported throughout their lives in other relationships? It would make sense to me that if this is true romantic rejection would be so much worse for guys because it's probably felt fundamentally as a rejection of who you are in a way that women don't even connect.

EDIT: Thanks everyone for the replies and discussion! There are some really interesting reflections on many topics. My favorite topics from this thread have been: What friendship, intimacy and romance mean to different people. When and which ways people feel safe and supported. Is cracking jokes with guy friends as helpful and venting to your gf. How different platonic relationships sometimes have different vibes and purposes. How women sometimes get put into the role of caretaker. And what things like status and masculinity have to do with it all. Alot of really interesting takes and perspectives which all are valid and play some role in this. I really appreciate the intention and discussion!