[groby_b]

Given that other skills work at different time scales, this doesn't always work. Two of the most common examples:

1) You work anywhere near money and commerce. The existence of Black Friday and the following weeks of shopping frenzy ensure that you will always be very aware what date Thanksgiving is. And that everybody will need timelines especially close around that date.

2) You work on a product that also gets marketing. There's a lead time of several months for a good marketing effort with coordinated press, and you really don't want to have all that lined up and then blow your timeline.

If you can help it, at all, learn estimation. Sure, don't share it if your management is incompetent at handling estimations, but the ability to predict a timeline with error bars is extremely useful. Practice by yourself. You'll be happy you did.

(And if your estimates are reasonably correct and you have decent management, you experience magic like "OK, then let's cut scope" or "Is there anybody who'd accelerate this if they were on your team". With a heavy nod to the fact that there are not enough managers who can pull off that magic - because they never understood estimation)