I think he's more referring to the poster who said he outlined the 'proper' way to handle a rape accusation. While I know that poster further added that it's a way to protect both parties, it's a very 'ideal' scenario where any of that would make a difference. In Stoya's case particularly, it seems it was a long time ago, seems to have not happened on set or anywhere where she'd have 'evidence', she's already disadvantaged because of the work she does (meaning, given her job there'd be plenty of people saying/believing it was all just a part of her personal sex life), she's naming a popular/famous figure, they were in a relationship, etc., etc.
Basically, even if she had come forward when it did happen, at best it'd be her word against his, and at worst (and sadly not uncommon at all in rape cases), she'd get dragged through hell and back trying to even get it to go to court, and would in all likelihood fail even if she did because of the stuff I outlined above. Given that she took this long to even speak up about it, it's an event that caused her enough distress to internalize it for some time and she probably felt that either no one would believe her, it wouldn't make a difference, it would hurt her career, or that she herself might even be to blame. None of that is uncommon with the kind of rape she experienced, and so posting about it on twitter now (after therapy, perhaps) is likely what she felt was the only way to get some modicum of 'justice' or peace after what was done to her.