I'm a proponent of keeping the chain relatively clean, but that's hardly tagging on 'extra stuff' - the chain gets a wash like that whenever the bike does. If you look at how the pro bikes get cleaned after each stage, they do something very similar. I'm not suggesting that validates the process, but I don't see them using chain cleaner devices either.
Ok, fair enough, but your posts appeared to back up the M method, when in fact it's nothing like it. My replies were that the MM doesn't get the chain clean inside the links and then wears the chainrings and cassette more. I agree that keeping the chain clean is what matters and your method works too.
Here is the first link from a Google on Pro Mechanics cleaning road bikes. As you say, there are no chain cleaning devices, but the method is very similar but uses brushes in the hand, a sponge and another bike specific brush. Arguably, the brushes are the same whether in a chain machine or using by hand. Far better than a wipe over on the outside with a dirty rag, like the MM.
View: https://www.youtube.com/watch?v=Sf80DnCgHRQ