"Just don't use it" is not salient advice for non-technical people who don't know how it works, and are misled by basically dishonest advertising and product packaging. But hopefully the market will speak, users at large will become educated about its limits via publicized blunders, and these products will be correctly delimited as "lies a lot but could be useful if you are able/willing to verify what it says."
I think the original sentence was written more in of "Your loss is my gain" competitive advantage vein. The real trick is, as you say, to critically assess the output, and many people are incapable of that.
