Why are most middle-aged and elderly people very opposed to keeping pets?

When people are old, everyone likes to be quiet. They are tired of keeping pets at home and being so noisy.

My niece has a Teddy dog, Beibei, and my father-in-law is very unhappy. At that time, he closed the door with a long face and didn't want to hear the dog barking.

Later, gradually, my father-in-law didn't bother the dog too much, because Beibei was very human, and sometimes she watched TV quietly with her father-in-law.

But her mother-in-law doesn't like Beibei again, because Beibei always urinates in the room, which makes the floor very tasty. No hygiene, no rules, shouting, the smell of the house on rainy days ... My mother-in-law always nagged Beibei about being unhappy and didn't drive her away. Who let them love me, love my dog?