Guess what number they'll accept and double it, put up a fight when they halve it, blame someone else when you miss it, and take the credit when you hit it. At most companies estimates are about control, expectation management, and blame distribution and not about information discovery.
Most people really suck at expectation management, much more than they suck at estimating work.
Most people really suck at expectation management, much more than they suck at estimating work.