> […] where sending inaccurate time was worse than sending no time […]

When you ask a question, it is sometimes better to not get an answer—and know you have not-gotten an answer—then to get the wrong answer. If you know that a 'bad' situation has arisen, you can start contingency measures to deal with it.

If you have a fire alarm: would you rather have it fail in such a way that it gives no answer, or fail in a way where it says "things are okay" even if it doesn't know?