IOW, it's an imbalance that can be corrected just like lowering blood pressure or insulin. Whether you play sports, design fashion and where you put your ding-a-ling is still choice.
Why would an exceptionally good looking guy like Rock Hudson think some hairy, scuzzy male pig is sexually attractive when he could go through as many pretty Hollyweird starlets as he wanted? Especially as given the taboo for homosexuals in his era, why would he choose men over women when he knew revelations of his homo behavior would destroy his career?
Normal good looking guys, especially movie stars, who could get as many beautiful babes as they desire, don't all of a sudden get the hots for men. It has to be innate. Obviously, almost everything is a choice, but people act on their choices for reasons. Homosexuals are that way because they find persons of their own gender sexually attractive. Full stop.