@tinstar
There will always be people in that situation. However, the norm is that the death of a parent is far worse than the death of a pet. So intelligence, empathy and common sense would stop most people from attempting to draw comparisons.
This. ^ In spades.
I know some people have gone NC with parents, and others have toxic narcs for parents; I respect that, and I am sorry for them. But many people DO have decent relationships with their parents, and for most people, the death of a parent will be FAR worse than the death of a pet. Even people who didn't have a great relationship with their mother (or father,) will still feel a terrible loss, and be horribly affected, and bereaved by their death(s.)
Some may be upset by the fact their relationship with said parent was never good, and will mourn the loss of a relationship that never was. The death of a parent affects someone for many years, sometimes for their lifetime.
And it has a devastating impact on someone young (ie, under 30,) to lose their parents, as they are not mentally or emotionally equipped to lose their parents at such a young age. For a number of reasons, including the fact that they don't have the vital parental support that their peers have, (when they get married, when an important relationship or marriage fails, when they have children, or when they experience any kind of upsetting life event.)
This is why, although it's a whole other debate, I am very much against people having children past the age of 45.