Low to mid tier white males can definitely get ethnic females if they willingly decide to. Kamala would be considered an extremely attractive black woman in the black community. She is mulatto/mixed and has a huge rack. Her husband is a tall, mid to high tier white male.
Low to mid tier ethnic males can't get anything. Strike one for being an ethnic male. Strike two for being short. Strike three for being ugly (although being ethnic is pretty much the same thing to foids). Strike four for being poor and barely making it. Strike five for having aspergers and being a social outcast.
White males check some of which I just described (without the ethnic part) and STILL can get laid. I've been in SF for over 5 years, one of the whitest major cities. I've seen it time and time again.