Sure, and some people go there looking for that. Most go there looking for short term enjoyment and possible long term relationships. That doesn't map onto the cofounder search. There is not much value in having the equivalent of "a couple dates" with at potential cofounder. And some people would actually see it as a negative, if they're worried (rightly or wrongfully) about their idea being stolen.
Which is probably a petty lousy idea.
I don't see how starting a company with a stranger is going to have better results. There will always be exceptions, but it seems like a bad idea.
You're perhaps incurring more risk, compared to a friend/colleague you've known for 10 years; but then, there may also be a reward in connecting with a talented mind who you wouldn't've otherwise. (And it's not as though startups with close friends can't also go south in very ugly ways.)