Nope, it doesn't work on anything that's not trivial or done before. And if the task is clear enough, that means they have already done a similar task and also

Nope, it doesn't work on anything that's not trivial or done before. And if the task is clear enough, that means they have already done a similar task and also somebody went and clarified it, which is time that somebody could have used to actually implement it. From my perspective, there are only three useful estimates: 1. This will take very little time, and everything is clear, eg a label change 2. This will take some time, but we do know how to do it: eg some new microservice doing similar things to other existing microservices we are familiar with or a feature similar to features we have built in the past. 3. We don't know how much this will take as we haven't done similar things before. That are the only useful estimates, and if anyone wants more detailed ones, well, tough luck, I am not wasting mine and my team's time.