The average smoker probably doesn't want to hear smoking is unhealthy. Does that mean doctors should adjust their advice respectively? At what point does "professional" really mean nothing other than "gets money for it, like a carpenter or a thief or a drug dealer might"?
We don't even have the right to "just give people what they want without any judgement on our part", but we certainly don't have the right to ignore those with legitimate concerns because ignorant or apathetic people are more in numbers. That goes for everything, everywhere. That goes to how you are supposed to look out for little siblings when parents are away, and it goes for expert knowledge or intellect.