It's a valid assumption because it's rare for a woman to make more than the man, and it's especially common for women in those countries to seek foreign sugar daddies, I don't understand why you think it's mysterious. It would be mysterious if nobody assumed that.
>The odd thing to me is I don't see our relationship as any more or less valid, who the fuck cares that we married for a different reason than someone else?
It's only odd to you because you're not affected by it. Men in local populations have a MUCH HARDER time finding wives that are local. When a foreigner jumps in and snatches up one while barely speaking the language it's a little "wtf."
Let's put things into reality. The fact of the matter is women marry up. They are attracted to men with higher status. Globally, white men occupy this status. Not officially mind you, no white man or person of any race would say this, but subconsciously that's the hierarchy. That's why white men, if they date women of other races often have a much easier time. Women everywhere tend to just put white men on that pedestal. In terms of status, a white man can get better results if they date another woman of a different class and race then they would if they dated some women of the same race and status. That's reality. The statistics on dating sites verify this racial phenomenon.
So of course if the tables were turned and rich asian and black men came stateside and started taking away white women the resentment would exist in the other direction. And such resentment does sort of exist (not in the dating scene) in terms of employment and jobs.
It's normal there's nothing wrong or right about the situation, but it is what it is.