How is it that so many geeky, socially awkward guys I meet have cute, extroverted girlfriends?

You could say it’s because they’re nice and deep down interesting people but I’m just curious how they even meet and start dating ? It doesn't really matter how great the product is if the marketing around it is off putting or non existent right?

Some of these guys I've met through work or mutual friends are so socially inept and dry that even I - a generally good conversationalist - struggle to talk to them, I CANNOT fathom them making the first move let alone flirting, being sexy and getting intimate.

Perhaps they happened to meet forward women who moved the needle?

One of my coworkers is the most quiet, socially dull, physically unattractive ginger headed dude and his girl comes in the other day - she's a taller, voluptuous, vivacious girl who's way more outgoing than him. As rude as it sounds a few of us guys were looking at each other scratching out heads. He's a nice dude but since when has that ever been enough?

It just seems to defy my experience with attracting women

I’m not mad about it, after all it’s better these guys get some than arrogant jock fuckheads but it’s perplexing nonetheless

Maybe it's the survivorship bias and I’m just seeing the few successful ones while most guys of that ilk struggle in perpetual singledom

I know that like attracts like and often nerdy guys end up with nerdy girls they meet through conventions and stuff but some of these women don't fit that archetype

Any Insight ?

Edit:

I appreciate the responses but a lot of you guys are leaping to the assumption that these guys must be mentally and financially superior or know exactly how to please women in the sack... be that as it may, the mystery for me is how the hell guys so shy and socially uncomfortable even get romantically involved in the first place if not through some stroke of luck meeting a woman who's into them and happy to make the moves.