It's easy to advocate to ban a thing if you don't do the thing! You see all the negatives of other people doing it without receiving any of the positives of doing it yourself.
You find it easy to ban because you would not be personally affected.
Personally, as someone who doesn't own a pet, it would be easy for me to firmly support the banning of all pets from many cities on the basis that they poo in public and attack people. That would be easy to support not because it's the right thing to do (which it might be!), but because I don't own a pet.