Toddlers predominantly damage fragile personal items. Pets damage walls, doors, floors and furniture. Additionally, pets, especially dogs, are capable of many times more destruction in a short amount of time.
I have 2 decades of experience in the hotel business, and pets cause much, much more damage than toddlers. The total of pet fees collected never made up for all the damage caused. And tons of people would lie about their animal being a service animal(s). With no shame, they would declare all 3 dogs they have service animals.