It may be even more banal than that. If you start putting simple boxed uncertainties on numbers the reader might start adding their own uncertainties to your un

It may be even more banal than that. If you start putting simple boxed uncertainties on numbers the reader might start adding their own uncertainties to your uncertainties when they communicate it further. I've found that when communicating with "leadership" it's best to not present anything difficult that requires them to make judgement, because they'll use that as an excuse to do what they wanted to do anyway (60±20% that's basically 80% and there's always some uncertainties with these things, so that's basically 90% so it's basically done, just ship it). Providing uncertainty is just asking someone else up the chain to pick the number. It's better to just pick it yourself to shape the conclusion you're going to make. The people making these decisions aren't scientists. They don't have any allegiance to your methodology or analysis. They just care about the conclusion.