No, I was there, it was not a bad joke taken out of context. The question was about how each speaker's firm is working on fixing the gender imbalance among partners and in general. The first three panelists (the whole panel was white men, two of whom are hiring partners) talked about how it's a real issue and their firms are working hard to bring in and retain talented women, including with mentoring programs, and seemed a little uncomfortable but earnest. Then the last guy starts off with something like (paraphrasing) I know this is an unpopular opinion, and not a PC answer, but I remember sitting in these events as a student and thinking, as a white man, why don't they want me? He then went on a rant about how women and minorities have it easy because law firms want diversity so badly, and that if they aren't making partner etc., it's because of choices they make (which seemed to be an allusion to women starting families). There was more too, but that's what I recall. Didn't seem off the cuff either, much more like he had thought about this a lot and was airing his grievances.
It was honestly pretty jaw-dropping and the whole room seemed stunned. So that's why I'm thinking this goes bigger than the one OCS email.