And he’s basing much of his conclusion on the statements of the hacker(s). Because someone(s) who would do something like this hack would also be above lying about their motives for doing so...and could be trusted implicitly.
I’d give equal weight to a male contractor finding his wife on there or a older male contractor finding the son-in-law on there too.
Or an IT worker who happened to have been a customer discovering that the data he’d paid $19 to conceal had been kept after all...
He is basing much of his conclusion on the immense expenditure of time and resources needed to gather all of the information dumped. If it were hacked rather than simply stolen and disseminated from the inside.
As to the sex of the dumper, only a woman would seek to destroy the fantasies of a million men.