That's why I'm asking for details, what's the demographic? How many girls do you think they've met or slept with before committing? At 30, I'm not crazy about a relationship when there are more women in the world than seconds in my lifetime. One woman for life or multiple years seems like an insane option at this age.
Think pragmatically, what do your friends gain by being in a relationship with one woman? What do any of us gain? Unless she has valuable family influence what is the point? When you're ready for a family, compromise and settle, but until then it's in your best interest to meet as many women as possible. The world has many treasures, women and experiences beyond your wildest dreams.
That's my opinion, and I respect people that commit younger than myself and already have kids, it's your personal choice; but there's definitely a lot of pressure on men to commit out of insecurity into a codependent union, rather than an interdependent one. A toxic relationship can kill you slowly, this forum is riddled with threads as a testament to that. It pays to be picky. If it turns out well for them that's great, it's simply not worth it for me until I'm in my 40s.
Anyway, my point is you might not seem 'nice' when you're really just being pragmatic.