I think your friends are full of shit.
I'd argue more people can relate/empathise with any person regardless of skin colour than those who can't. Maybe it's even just that white people in the US are fucked? Idunno, hell my favorite game characters are either black (Lee TWD), gay (Bill tLoU) or a young hispanic female. Maybe your friends are just idiots?
I do disagree with the trophy comment, and also there being more BF/WM than BM/WF representation in the media... well at least in Canada anyway.
It is really rare to ever see a WM/*F in any TV shows or Movies; however WF/BM is super common. That's my experience anyway, though not that any of this even matters... So I'm Shutting up now, lol.
Now onto the trophy comment. As someone who married outside my race, I am pretty pissed off at the suggestion I married her due to some fucked form of White Powah! I will admit it's fucking irritating that because people in the US can't get their heads out of their asses when it comes to race, all white people are painted with the same brush.
So I am rambling but sure ok, maybe some mentally fucked guys view a different coloured women as a trophy, but that shit's not normal and hardly exclusive to whites.