In "The Bonding", Troi and Picard get into a pretty detailed explanation of how human beings (specifically, since Jeremy IS human) experience death as a natural part of life. Nothing they say suggests anything has changed in the grieving process since our time. I'm sure plenty of people in the Trek universe have tried 'bringing back' loved ones, and ultimately found it to be unnatural and unhealthy. I know I would. Any episode that involves the recreation of a person that has passed is tragic.