Earlier quoted context omitted.
One reason is that non-scaled comms suffer from “telephone game”. If you do it like you’re saying, then go down 3-4 levels in the hierarchy and check what people are hearing, it will have mutated away from anything you originally said. Sometimes to get everyone aligned (as best you can) you have to give everyone the same message at the same time — but it has to be a simple message.
Mission command [1] might be useful here. The main idea is you state the mission and your expanded intent and each subordinate command does the same thing all the way down the chain. There’s several “checksums” commonly employed in the US Army. The subordinate command’s orders will contain the verbatim mission statement (typically one sentence with the five whys) from the both their commanding unit and the next level…
In practice this is almost never done at scale because having them sequentially ordered means that they must be done pretty quickly and there are too many political turf battles to let them be done quicklty.