This is just one person's made-up interpretation and carries no weight, probably because it's vague and completely unenforceable. 30 seconds is measurable. "As promptly as possible" is so ambiguous that it effectively has no meaning.
Yeah, because the 30 seconds as stated in the rules gets enforced so strictly as the rule is written. If we're not going to pull out a stop watch on every throw, the 30 seconds is unenforceable too.
Given a choice, I think if we're going to have a time limit, make it a real time limit. And define exactly when it starts (already done) AND any and all conditions in which it can be paused, stopped, or re-set. Otherwise, my interpretation of the rule is as valid as anyone arguing that the clock does reset at every "distraction".
If we want precision in rules enforcement, we need precision in the rules themselves. I'm all for precision and would welcome clarification one way or the other in the next rules updated.