There's not really any value in having that sort of chat with anyone in a professional context.
And it's labelled "aggressive" because of several centuries of hardcore religious puritanism leaving their mark on all aspects of US culture. Sex is naughty. Sex talk is aggressive.
The parent said "There's some value in being able to talk bluntly with other men. And I'm not sure it's much worse than what I observed groups of women talking about".
And this was immediately taken to mean "aggressive sexual comment".