But what is the correct time? There is a whole subfield of project mgmt dedicated to exploring the theories around this question. And the line between "psychological games" and "psychology" is very thin, some would say non-existent.
Exactly my point, figure out the correct time and optimize for that, introducing what's effectively a neurosis seems kinda of neurotic way to work :)
But there is no correct time. That's a deterministic paradigm, whereas tasks are probabilistic events, with a distribution of possible points. Take a given task, and there are versions or scenarios where it takes 1x units of time, all the way to 100x. What critical chain does is help the worker play with the 3 sides of the PM triangle, time, budget, and scope, in a way that optimizes for the global throughput, not just their little local optimum.