Why would you go into a thread that was obviously dedicated to the people who HAVE rescued, say that you saw no reason to ever get a rescue dog because they can't "do anything but be a pet" and then suddenly be perplexed as to why people had an issue with that statement? If you consider weight pull to be "work", then so is agility and some of the top dogs in that sport are rescue/pound dogs.
This board is a pretty even balance between rescue and ethical breeders, so there's no huge pressure to go either way. Many people here have a mix of rescue and breeder dogs at the same time.