Stupid Straightness

I had this breakthrough! So I was asking myself why people think it's a choice. To me it's not! So why? Well, then I had this amazing conclusion that all of you probably already have.Have you ever noticed that every gay lesbian and trans say it's not a choice yet every straight person says it is? (I'm excluding Bisexual for an obvious reason) I think it's because all the straights that say it is don't understand because they don't like men/women. Because it's only close minded straight people that say this. What are your thoughts?