Perfect is the enemy of done, but does it then follow that it’s fine to submit an “OK” thesis? One which you know has typos in? One which you know could be better? One which you know has things you could fix? It’s OK… It’s fine. It’s acceptable. It’ll do.
Is that OK?
Since most candidates will have a successful viva that leads to some form of corrections, it’s a natural question to ask if you could just submit your first, could-be-better, OK version of your thesis. There’s only so much time to do a PhD. There’s so much going on, especially recently. I can empathise with someone who would make the argument that they just have to get their thesis in now, and then fix anything later on.
If you know there are things that could be better – in terms of making sure your thesis communicates your research – it’s nearly always worth the extra effort before submission, the viva and corrections. If you’re tempted to let things slide, to rush something in, to say you’ll fix it later, I’d urge you to take another look. See what you can do.
If you have a deadline you cannot break, then at least prioritise the most important things to help your thesis be the best it could be.
You’ll never reach perfection, but your best is a lot better than OK.