I just re-read the article and it doesn't seem to mention the carrom ball at all...
I was more mentioning the fact that he labelled Narine's and Mendis' carrom ball, a doorsa. Whereas they are two completely different balls. Therefore indicating his care lack of understanding of modern spin bowling. If he thinks they are the same balls, with the same action and flexing issues.
I don't think that any of his quotes he clears names the players in question. As he can't, but we all know he is referring to bowlers like Narine, Mendis and Ashwin who don't bowl traditional doorsa. As well as other bowlers that bowl traditional doorsa like Murali, Saqlain and Harbarjan.
I don't personally don't agree you should be teaching spinners or fast bowlers how to throw, just based on the belief everyone else does why can't we.
The situation is no real different then fast bowlers in the 50s and 60s who came out with dodgy actions, because some coaches felt top bowlers like Lindwall and Larwood chucked in previous eras and got away with. So they never cleaned up some dodgy actions at FC and junior levels. Then players got found out at Test level and got 'thrown' out of the game.
But at the same time quite of few of those bowlers we have found out have similar natural straightening issues to some modern bowlers and were bowling as clean as they could.
I don't think you can really have a hard and fast rule when it comes to chucking.
Someone who bowls at 150km/h doesn't make them a chucker, but the same is true if someone bowls a new variation bowl with a different action.