Bad advice. A discarded system is already in poor condition, which is why it's discarded. A quality clarifying shampoo absolutely will not strip like detergent designed for scrubbing pots and pans. Where do people come up with this nonsense?
I agree, people should do as they wish. However, using something for a purpose other than what it's designed for, is just simply not intelligent.
People unwisely use dish soap on their automobiles too. As a matter of fact, it is called for, if your intention is to strip wax and sealant from the paint. Can you be cheap and do it...Yes, but if your desired outcome is quality.... It's a terrible idea.....and "paint not falling off" isn't confirmation of doing something right.
Would you polish your car with hair conditioner, or scrub your pans with Redken shampoo?