Concerning Corrections
You can do a lot to write a good thesis. It’s still likely that you will miss some unintentional typos. You might not spot when a sentence gets really long without a break. And after submission you might change your mind about a particular phrasing or explanation.
Any corrections that your examiners request are simply that. Corrections. Amendments. Fixes. Requests for changes to make your thesis that little bit better.
They don’t think you didn’t care. They don’t believe you should have done more or better.
Writing is hard. Writing a book is very hard.
If during your preparations you spot something that needs correcting that’s fine. If your examiners tell you about some in the viva that’s fine. After the viva, get them done and move on.
Don’t be too concerned about corrections.