Ahh I feel this on a personal level. I've had a book that just needs a cover just sitting on my PC for like three months now and I keep putting off pulling the trigger.
Course, I tell myself it's a good excuse each time: wife's birthday needed planning, kids were sick for like a week, surgery and recovery for me have been a nightmare... But I'm sure I could fight through the pain for fifteen minutes to hire some rando off Fiverr to make me a cover.
Will I do that tonight though? Heck no, too sore and waiting for meds to kick in.
Yeah it really makes we wonder how much lost potential is out there.