I don't really see how this is even a political question.
For a politician... when it comes to issues on sexuality, gender and access to rights and facilities, whether or not you believe that someone is inherently how they present themselves does matter.
Why does this matter though? Supposing that people could decide to be gay in a vacuum, why should that have any effect on their ability to access rights and facilities? It would still be discriminatory to allow firms to punish them for a lifestyle choice that is inconsequential and damages no one.
