Yes, science changes over time, but that’s neither here nor there because that line of thinking can lead you to question EVERYTHING. Who says gravity is real– maybe the experts will change their minds in ten years! Maybe sugar is really good for you, that might change in ten years also! etc etc.
The current consensus among leading medical experts is that sexual orientation is hardwired at birth, while addiction is not (unless the mother was addicted to something during pregnancy). Period, end of story, and anecdotal evidence is irrelevant.