No, that's not what I said, that's you putting words in my mouth to suit your narrative - see my my earlier point :-(
There are multiple ways of communicating, speaking is a key one - there's nowhere in the law book that says we have to verbalise our decisions, the official signals are visual. But if you give a penalty for not rolling you would verbalise it no? Colour, number etc ... and then make the signal. Same here. Use the best method to achieve your goals, talk to the players, wave your arms about for the touchline.
OK but what do you reckon - would it be helpful to have a signal for a PT that you could give on the spot - without having to move away from the action ?