There is a weird disconnect for some people around submission. They imagine submission is like jumping over a ravine between here and there, between almost- and now-submitted. They take a breath and jump and hope it will all work out, hope they’ll land on the other side.
It’s really not a leap of faith though. It’s the same path to the viva they’ve been on for years.
At submission, you’re striding over a bridge, not jumping and hoping.