Look at what might happen: say you go on a date, you like each other. Maybe you end up together, maybe for just a while, maybe for a long time or you get married. Do you really care why or how you met then?

Even if the opposite happens, so you go on a date, you don’t really get along or aren’t each other’s type. What did you lose? An afternoon or an evening? And you (probably) still get some nice conversations out of it, or just “experience” in dating. Not really a big loss either.

It’s hard enough to find someone. Take any chance you can get, no matter how much of a long shot it may be. You said in some comment that he has a “wide social circle” or something like it. I would be glad he managed to use that for you in this way. If it doesn’t work out, nothing of value was lost (if anything it might be embarrassing for him in his social circle, I don’t know). If it does work out literally everyone just wins.