With guide dogs the benefit is huge - someone can get around without human assistance.
With "emotional support" animals it just means someone gets to take their pet with them to have coffee. Not a big enough benefit to outweigh the downsides.
If a person is unable to get a coffee without an assistance dog, and the dog is properly trained, why would you want to rob them of participating in a normal life?
Something being "just" for you, does not mean this holds for everyone.
The whole show is to motivate people to want to pick up a book, which to me sounds like an emphasis on doing.
If you’d replace this with posters or shows that just say “READ A BOOK”, it would not be as effective.