You are right, but I'd also say that high security brings a lot of friction that slows down decision making. Irrespective of Trump and his friends (whom I dont like) as a point of principle I think world leaders have to choose between secure and slow vs fast and risk of leaks. For most purposes, fast and risk of leaks is going to be more optimal.
I hear you both. Frankly, I think we could use a little friction in communication to slow it and the resulting decisions down. I don't know about everyone else, but I don't make best decisions on the fly.