He can leave whenever he wants.
Discussion
No he can't, he's a prisoner of conscience.
Yes he can. He’s a prisoner of religious zealotry.
And what then of the zealotry of child mutalation?
His objection is religious, not medical. He has never argued against the despicable practice of gender reassignment surgery. Just his insistence that the word of God in the Bible is ultimate law, not humanitarian or common sense abhorrence to woke insanity.