When you’re a professional procrastinator, you get used to the background hum of anxiety in your mind - it becomes little more relevant than a buzzing fluorescent tube over the kitchen table. An annoyance, but not something you particularly feel the need to do anything about.
Generally this arises because you’ve procrastinated on so many matters that resolving any one of them simply won’t make a difference, and you know that resolving all of them is an impossibility, particularly those where the deadline has been, gone, had children, and moved to the country in its senescence to spend more time in nature.
I used to work with someone (back in Palm Pilot days) who would have a list of something like 100s of overdue ToDo items. He was just terrible at starting and completing tasks.
And, yes, you can get to the point where the magnitude of curating and chipping away at your list is so great that it's easier to just put it out of mind.
Generally this arises because you’ve procrastinated on so many matters that resolving any one of them simply won’t make a difference, and you know that resolving all of them is an impossibility, particularly those where the deadline has been, gone, had children, and moved to the country in its senescence to spend more time in nature.