Wouldn't it be great if people were perfectly rational agents, gifted with objectivity vision and purged of all bias? Of course you're right, you should discus

Wouldn't it be great if people were perfectly rational agents, gifted with objectivity vision and purged of all bias? Of course you're right, you should discuss blockers whenever you have one. But people don't want to discuss blockers (or don't want to discuss at all), or don't identify something as a blocker, or would like to solve it themselves, or want to "protect the team" from this information, or think they'll get it resolved sooner without extra communication, or expect that they'll disagree on the course of action, or feel ashamed of having this blocker, or any other reason out of a hundred. They won't rationally formulate it like I did just above, but it's just what people do: they get biased and their brain doesn't take the most rational course of action. A personal bias: I tend to prefer solving uncertainties by writing more code than talking to people. This is a stupid thing to do and I actively fight against it, but the fact is that I naturally tend to favour the "code" approach to the "communication" approach: standup forces to surface the problem and people can challenge me.