Are you aware of the reported rates of hemophilia in African and Asian countries?
Interesting supposition. Makes sense.
But does that mean I should support them getting legally married?
Much, much lower than in the Western world. And hemophilia is not thought to be more common among certain races or ethnic groups. It's severely underdiagnosed and undertreated, in my unscientific opinion leading to the deaths of thousands of children
each year in places like India, China, Indonesia, and sub-Saharan Africa.