OP never said the bias was unjust, only that the bias exists and people working in that industry should be aware it could be used against them.

Multiple studies exist showing that men and women have very very different views on pornography and in particular women's views on it are significantly more negative than men's views. Furthermore people's views on pornography change as they get older with older people having an even more negative view about it than younger people. This isn't like a fringe difference either, consumption of porn by women is less than 20% that of men. There's nothing sexist about pointing out that women can and often do have very different views on a subject than men, and no reason to think that women having a negative view of pornography somehow makes them inferior in anyway.

>Multiple studies exist showing that men and women have very very different views on pornography and in particular women's views on it are significantly more negative than men's views

Can you cite some of these studies?

IIRC there is a difference in consumption rates between genders, but not negative attitudes.

I think the implication is that women tend to have more of a problem with pornography than men. Perhaps if the CEO had been a man it wouldn't have gotten to the point where it resulted in their interview being cancelled.

Agreed. And while I doubt this is what the author of the comment actually had in mind, I think it is important to notice that porn, by large extent, takes advantage of women, and so it’s women who naturally have bigger issue with it than man. And I assume the CEO who sent the apologetic letter was a man. In other words, the author inadvertently exemplifies how sexist IT can still be.