The legitimacy of the "Is LGBT a choice?" argument in the first place.

Don't you think more progress would be made if instead of trying to convince people on the complex science of brain functions, we just start asking why it matters in the first place?I understand I have a certain privilege here because I'm bisexual and I'm not taking this issue lightly - but I wanted other people's input on what would happen if we just said "It's not a choice, but even if it was, why does it matter?".