To recommend such a harmful product as the first thing to try to the general populous - especially ones that do not know what a clay bar is, how to use it, what it's for, the difference between a polish and a sealant, etc. is not smart.
Doesn't matter what success you have had or who you have learned it from - it doesn't make it right. A good detailer always uses the least abrasive product and works his way to more abrasive products. Period.