There wouldn't be much of a demand for IVF and GIFT if it wasn't for Chlamydia trachomatis . We have the responsibility to warn our patients about the consequences of dangerous lifestyles. If we don't, then we must bear some of the responsibility when they suffer. Yes they do, and with all knowledge and power comes accountability. Would that all doctors had 'God-like' characters as well.
Doctors have a responsibility to educate, warn, diagnose, treat and protect.
If we are clearly doing it out of concern for our patients and not merely to appease our own consciences, they will usually respect us for it. Even if they don't, it doesn't alter the fact that we have a duty to tell them the truth. But we can't force people to act in the right way. No, God doesn't work like that. We should do the same.