Shocking part is so many people are just falling for this argument without thinking about it. As well as those who think about it, and to join in the thrills of a witch hunt, justify to themselves that this self-plagiarization is not just a real thing, but unethical behavior bordering on criminal.
Fabricating quotes and making up facts though is bad and justifies firing and blacklisting. Both practices are unfortunately endemic within contemporary publications, perhaps due to a lack of fact checkers at many publishers.