An estimate is not a deadline. A deadline is not an estimate. Mixing them up leads to unhappiness. Giving an estimate should not come with the whiff of punishm

An estimate is not a deadline. A deadline is not an estimate. Mixing them up leads to unhappiness. Giving an estimate should not come with the whiff of punishment for probabilistic inaccuracy, potentially due to factors out of one's control. That's what deadlines do. That's why they distort behaviour.