I will make a contrarian point. If the laws of counselling require that the counselor accept homosexuality, maybe Christians should not try to enter that profession.
I would be like an atheist complaining that he can’t be a priest.
To which I will respond:
If state laws require that a pharmacist sell the morning after pill, maybe Christians should not try to enter that profession.
If state laws require that a physician perform an abortion, maybe Christians should not try to enter that profession.
Do you see where this logic proceeds? Eventually, "Christians" will no longer be able to enter any profession because their faith is in contradiction with the state and/or federal practices.