The standards do not "keep changing" for all breeds. The FANCY THEMSELVES set the standard, not the AKC. The dobe standard, for instance, has had VERy few revisions over the past 5-6 decades!
And I take exception to the statement, that someone who does REAL work with their dogs - agility, obedience, etc is often just as strenuous and requires a significantly LARGER amount of training than some "real work" as you put it. By slighting those that choose to show their dogs in some performance venues over others, you do every breed a disservice. The fact remains, there aren't enough working homes for what breeds were originally intended for, period - we don't live in a society where people all inhabit a large farm that requires dogs to gather and tend the flocks, where the tax man needs protection as he goes from house to house in the form of his dog, or where we need dogs to protect us from lions out on the safari. For many dogs, the original work is simply not possible or practical in this day and age - and their working abilities can be tested, tried and extolled in many other venues. Athletic ability, drive, biddability, intelligence, etc is not limited to one or two venues.
Assuming that just because a dog is from a "working breeder" that is is healthier is also an incredible injustice. In the working world, MANY people believe IF IT CAN DO THE WORK, its healthy - ignoring that a dog with incredible drive will often continue to work even though its hips are ruined, its heart is giving out, etc. "Healthy dogs" drop dead from heart attacks on the field every day. Health testing is not limited to the "working" breeders, and in fact many breeds (my own, for instance), the working breeders do little to no health testing period aside from hips.
Trying to create lines where none need to be is never going to do ANY breed any good. "Working" or "Showing" - every dog has multiple aspects of its breed that need to be evaluated, and responsible breeders address them all.