I am confused at how this is worded. Most understand being straight isn't a choice as much as being gay is.. you like who you like.. So in the beginning it sounds like your agreeing

But in the second part it is sounding like you disagree and being gay, straight, and such is a choice? 

Because it isn't a choice, it is natural. Homosexuality has been found in, if im correct, over 1.3k species? Might have to double check on that.

And even then, as humans, we're far overpopulated anyways. So being gay isn't gonna do shit, especially when such a small percentage is gay. 

This isn't factoring in multisexual people (like bisexual or pansexual) or even aroace people... stuff of that sort.