Please let this comment through mods. I am trying to temper my original one because I realize it could have come across as much more radical than I intended it to be.
I would never, Chas V’shalom, ever claim that R’ Moshe’s P’sak would have been any different or that it doesn’t apply. No one ever has the right to say that. My only thought is that he may not have written about it in as strong a language if he had ever seen a working platonic relationship. It was just a thought I have had, nothing more, and definitely nothing near a Halachic argument.