Many people, including me, often insist on wanting to know the truth, even if it hurts. Some people will be more prepared for uncomfortable truths than others. There are often some situations where you will have second thoughts about whether telling the truth is actually a good idea... Some examples:

What if a friend is suicidal or very depressed, and their loved one has cheated on them, and you know it? That person in question is of course a disrespectful bastard, but anyway, your friend deserves to know the truth, but still, getting to know it might mean they get extremely miserable.

What about people who go see mediums, who claim to talk to their dead friends and relatives? I'm not excluding the possibility that it can be done for real, but it's undeniable that many people in the industry are very skilled cold readers, who simply exploits naive people for money, it gives them comfort, but it's still extremely cynical! Should you tell the victims that it's a fraud?

Another good one! What if a girl is kidnapped by a sick sadist who tortures and rapes her for hours until he finally kills her. The news will of course be all over this to make money, but think how their loved ones feel. Not only is she dead, she suffered immensely in the moments before, without any glimpse of hope... What if the media and the police lied, and told her parents that she was in an accident, and someone found her, she couldn't be saved, but she had the time to say that she loved her family and friends before she died, and that she knew they loved her as well, and hade a glow of peace in her eyes before finally passing away? That would be a much more comfortable story to hear for sure. It would also be easier to believe in since they want to believe it.