Yes, but a time keeper stops the clock the moment the ball isn't "in play", therefore you can roll around, amble off, take three or four minutes taking a goal kick, it doesn't matter, I'm proposing the clock is ONLY ticking when the ball is live.
There seems to be little logic to this and I just wondered whether, or not, it's time to have a better process. For example whenever play stops the time stops, i.e. a sub wants to take two minutes walking off the pitch then crack on Son, the watch is stopped. When a goalie wants to take the ball...