They don't help you do that, even though poor non-technical managers might think they do. That's why good software projects don't use them. I don't see any story ticket velocity points used in Linux kernel development.

You can't estimate non-trivial software, and if you are doing trivial predictable work, you should be automating it, not endlessly estimating it.

I didn't say I would "deliver" anything. It's done when it's done. You can't predict the outcome of a software project. Many of them fail and micromanagement makes them more likely to fail.