That's the difference, however.
If I hear that someone's dog has died, then I'll feel sorry for the owner. If I hear that someone has lost a child or another family member, then it's seems tragic to me.
A month or so after my husband died, I got a phone call from his (middle-aged) daughter. She sobbed. "I don't know how to tell you."
My knees gave way. I thought that another family member must have died. It turned out that her brother's very elderly cat had died.
Now, I get that she too had suffered a bereavement and was possibly not in her right mind. I certainly wasn't in mine - the funeral was during lockdown and I left the house on my own for the crematorium and returned to an empty house with no family members to support me.
However, I found myself in the bizarre situation of trying to hold myself together and being expected to phone her brother and to extend condolences on the death of his extremely elderly cat.
I felt obliged to do so and phoned his number. I got his partner, who seemed quite bemused that I'd phoned.
I get that animals are important companions for many people, but there's no comparison between a pet and a human being.