It is important (since may folks here have not read the book & don't know what is and is not allowed on the MC) that people know what the book says.
And you are correct. Nothing is written in stone but that poster may not have known that chewing is not really a god thing if you are following he Master-Cleanse by the book. If they want to create their own variation that is great and welcome. WHat ever works. But first folks should know so they can make and informed decision.
I also agree with you that it may not be for everyone.
Take care and lighten up. I think the poster was just trying to help by providing info and not being dogmatic, but that is just my opinion.