…your thesis isn’t perfect. It shouldn’t be. It can’t be.
You get corrections because you’ve probably never written a book before. The thesis you submit for your viva is the very best draft you could write.
Typos creep in. Style choices don’t quite work. You miss a reference or a full stop, a comma or the numbering of a figure.
You get corrections because you tried your very best, not because somehow you failed. Corrections aren’t failing. Corrections are part of the process.
Corrections are your examiners saying, “Here, take a look, this is how you could make this better.”
But never perfect. “Perfect is the enemy of done.” You can’t make it perfect. You can make it done.
You get corrections to get to done.