Hi Francis (is that Lopper from the old forum?)
I think that not being able to test will result in far more people being depressed than might be depressed because they don't like the test results.
By the same argument, people whose cars fail MOT tests will be really depressed about it, so lets scrap MOT tests. Lets also stop all cancer screening - after all if you don't know you've got it you can't get depressed about it.