You have to read your thesis to get ready for your viva, even if you don’t want to. You thought about it, you wrote it, you rewrote it and now you’re done-
-except you read it and you think you could still do some more.
A paragraph that meanders. A section that is too long, or perhaps too awkward. The odd typo or twenty is fine, but what about the places that proofreading forgot? What about the vague sections that sort-of-but-don’t-quite make the point you wanted?
You grin and bear them in the viva, if they’re brought up. You explain what you meant, and what you would do to make it better – not perfect, never perfect – but better in your corrected thesis.
And when you see them during your prep you think, you write and maybe rewrite again, leaving a note in your margins or on a Post-it, clearing up the vague that you left in. They don’t disqualify you or your thesis at all.
There’s just that little bit more to do, then you really will be done.