I am sure a child would agree they would never want to go to school and eat treats all day. Yes they would love it, but it would not be the best life for them for example would it
Yes, but dogs are not children, they are dogs and have different needs. I am guilty of anthropomorphising at times, too, and thinking that my dogs need exactly what I need, but that's not true. I am human, they are canine.
The ad is not saying - leave your dog outside to roam around and be unsafe. It's my experience that shelters are against leaving dogs outside so they probably have a very good reason for stipulating this.
A life on a farm, outside to romp around and have a great time, would be ideal for a dog - matches their needs, their psyche, and their expectations in life. Sure, probably wouldn't be great for us, but we're not dogs, are we? Although we love them and treat them like our babies, and do our best for them - it has to be what's best for THEM, not what would be best for us if we were in their positions. Like it or not, there is a difference between us and they have different needs to humans.
I would imagine that if you wanted to adopt this dog, they wouldn't be saying not to let it inside ever, they would be saying, provide a safe environment, with shelter, a place to sleep, and a lifestyle that is majority outdoors, because that's what this particular dog needs.