This is the point that I'm trying to make, only to be told that I don't know what I'm talking about

- my experience, based on a lifetime of training dogs, is that most of the public choose a dog based on nothing more than appearance/size/"status symbol"/cost, and totally disgregard temperament, and suitability for their own lifestyle.
Of course there are exceptions to my own experience that dogs with strong working instinct should only be aquired if they will be able to use that instinct, but generally it does hold true. The exceptions are likely to arise when either the owner has a lot more nouse than usual (common sense is extremely uncommon) or when the dog doesn't have the strong working instinct that the breed is
supposed to have.
This working sheepdog, Win, is a case in point.(tried to upload photo, got an error message again) She is an adored pet, but primarily she works sheep (and cattle) and if she could, she would run for hours, working at top speed. Of course, sheep don't need to be moved around all day every day, most of the rest of the time she runs around behind whichever tractor he happens to be driving, again for hours at a time. And when there's no tractor work to be done he spends an enormous amount of time and effort throwing a ball for her. After an hour or so she's happy, but after a few minutes rest she's raring to go again.
My point is that she has a very happy life, but if she didn't have work to do then she would have a very miserable life if she was with an average family that didn't understand that working dogs need to work and that dogs bred for working sheep on hill farms need hours of excercise every day.
Of course, she may settle down a bit when she gets older, she's only 13...