Seriously not liking dogs would be perfectly legitimate reason to block for me too. You can tell a lot about a person on how they treat animals
Very true!
I have disabilities and I need a dog to be my support. I had a huge fear of walking alone until I got a dog. It was also much easier for me to talk to people when I was with my dog. I managed to meet lots of new people only because I had a dog. I live in a country where people are really introverted, but the second they see you have a dog they come to talk to you. And the other way. It's easier to talk to a person when they have a dog because you can use the "Wow, your dog is so cute! What breed it is?" tactic and people often love talking about their dogs.
I also went to agility and obedience courses with my dog, so she gave me new hobbies so I didn't just sit inside playing video games all day.
I'm lonely, so my dog gave me much needed company and friendship. She was the one that made sure that I go to 1 hour walk every day instead of rotting in bed. She was the one that taught me responsibility and caring for others and maturity because I had to brush her fur, brush her teeth, cut her nails, take her on walks, give her food and water.
She taught me to be a better, more social, more mature and caring person.
Dogs are also great for blind people. I know a blind person and she has always had dogs that help her live an independent life. There are also dogs for deaf people, the dogs will come and put their paw on the person's knee to signal that their phone is ringing or someone is ringing the door bell. There are also dogs that can smell cancer, detect heart attacks, etc.
In my country we had a "Hero dogs" awards, and every year they award about 10-20 dogs that have saved human lives. There are a few professional dogs like police dogs, but most of them are normal dogs who found an old person lying in snow or smelled a fire in the barnyard or started barking and jumping on their owner's chest in the middle of the night when they got a heart attack etc.
And that one poster said something like "Humans shouldn't have dogs. They are wild animals like wolves and bears and belong to the forest."
My dog couldn't have survived one month alone in wilderness. And I can't survive without my dog. After my dog's death my suicidal feelings increased a lot. So I will just automatically block any who don't like dogs.