That seems an overly rigid conclusion. If there happens to be some sexual attraction but he's determined not to give in to it how is he a fake friend by default... I agree it never helps but some guys are attracted to EVERY attractive woman, which doesn't mean they can't have a good friendship with some (unless he's properly sexual frustrated perhaps)
Not rigid just a generalization. Of course there's always exceptions but in general if a guy is attracted to a girl he'll act like a friend but deep down inside he's just waiting for an opportunity. For me finding someone attractive and being attracted to them is two different things. I know lots of attractive females that I'm not attracted too, hence we can be friends.
I had a good friend who was very obviously attracted to me when I was in a relationship. He was friends with both of us and he was most definitely not a fake friend.
Do you think it's true that you shouldn't invest in fwbs as friends rather than fuck buddies? That men can't be trusted, that they don't give a shit about you, that they're just using you, that they're dogs, that n**** ain't shit? The men I fuck treat me very well and have always been willing to talk...