That's fair, but the breeders that test their breeding dogs galore, are GREAT but they shouldn't try to make the buyers of spayed/neutered PETS test their dogs for EVERYTHING all the time. My parents are not testing their mutt for ANYTHING because it doesn't change anything in the way the love and treat their dog that they can't figure out on their own without spending thousands of dollars to just wait and see if there is anything slowly going wrong with hips/eyes/ and the like. Their last dog was from a BYB (i know hisssss) but it lived to be 16 and died of old age and cancer. both would have been unavoidable.
Asking people to have their pets tested using a DNA test so they KNOW whether they need to monitor their dog on a frequent basis for symptoms of a disease that they have inherited from their parents is not aksing them to spend thousands of dollars. It is asking them to do the test so they are prepared and can hopefully catch the disease early so maybe it doesn't cause so much damage to their kidneys that they go downhill quickly and if they are Affected that may end up costing them thousands of dollars which could have been prevented if the breeder had done the right thing and tested prior to breeding.
Telling pet owners that their regular vet can perform a patella examination during a regular office visit and they can have those results registered with OFA for $15 if normal and for free if they are abnormal is not asking for thousand of dollars. But again having that test done will provide them with information that could help them to prevent putting stress on those joints and perhaps avoid having to do surgery later in life.
Recommending that pet owners who wish to compete in performance events have hips x-rayed to make sure the stress of the athletic competition willl not be a problem for the dog is still not asking for thousands of dollars, x-rays run about $75-$125 dollars and are I think $35 to submit to OFA. It is also helping to ensure that a dog does not actually do damage to itself while doing something its instincts may drive it do to do in spite of the pain.
Telling buyers that they should include a thyroid panel as part of their yearly exams because hypothyroidism can cause temperament change, coat damage, joint damage, and other problems is good advice for any dog owner. Many hypothyroid dogs get dumped when what they really need is pill twice a day.
Having eyes checked once every couple of years to make sure your dog isn't losing its vision is still not recommending unneccessary testing. Many dogs can hide their vision loss until it is quite well progressed. Knowing your dog is going blind can help you to help it adjust.
I have plenty of friends and family who have mutts and have spent money to have these tests done. Often they have spent far more than I have in their vet bills because they didn't know what to test for and the didn't know there was a problem until there were significant symptoms.