Apples and oranges.
Practicing homosexuality is a choice.
A person’s race is not a choice.
That only matters during this “debate” phase, before the government has announced it is changing policy. Once the government makes a decision that it is going to give a class special protections, it doesn’t matter what the nature of that class is anymore. You can argue it’s “different” till you are blue in the face, but they will still be just as protected under the law as all the other special classes.