Why do drivers accept an UBER PET booking and then get mad if there's a dog?

My dog had surgery and I have to uber to and from the vet because I don't have a car and she can't walk, why tf do drivers show up not expecting a pet and then getting mad when there is one. My bro you literally accepted Uber Pet. I'm even doing a nice thing as my pet is a service dog so she can go in normal ubers but I book uber pet to be nice.