This always made the most sense to me. You get your return and review it; sign off if it's good, modify and return it if you have more claims, something is wrong / missing.

I'd wager the majority of people wouldn't have a reason to submit a revised return. And if the federal government generated your return, hopefully that would give them reason to automatically exclude you from audit, (ideally) reducing the burden of auditors.

As a Swedish expat in California I cringe everytime tax season comes. Both because of how annoying it is, and because I know how simple it can be.

Works this way in the Netherlands too, you login on a website and just click through the information they have pre-filled in normal cases.