So you do choose your sexual preference then, you just don't choose who you are attracted to. Got it.
Likewise, I choose to prefer women instead of men. Women make for better mates for me personally, and suit my other life goals much better (example, I'd like to have a biological child of my own if possible, and that can't happen with a man). I'm also more physically attracted to most women than I am to most men.
Still, I'm not foolish enough to buy into propaganda that says I did not have a choice when I know better. Anyone who is honest with themselves will admit that who you are with is a choice.
No one is an absolute slave to the physical features they find most attractive in a mate. I prefer natural blondes, but had a relationship with a brunette many years ago. I also have many other preferences in terms of physical characteristics - none of them prevent me from being in a romantic and/or sexual relationship with someone who doesn't possess one or more of those characteristics.
None of your preferences in the physical characteristics of a mate absolutely prevents you from choosing someone who doesn't possess those characteristics, either - UNLESS you CHOOSE to make that characteristic a "deal breaker" for you personally.
You have every right to do that, but don't try to tell me it's not a choice.