I remember once listening to a talk by a psycologist from Farnborough who had been involved in aviation accident investigation. He told a story of one crew that did land wheels up, and the captain commented "there's something wrong with the brakes"
He(the psycologist) apparently investigated a number of wheels up incidents, and remarked that in almost every occasion the crew had gone through the checklist and called "gear down three greens" and then landed with no wheels.
I can remember scaring myself a couple of times,but always got them down. I bet most pilots can too.
I made a strict rule for myself and my pilots."when you see a runway ahead check wheels." This was a double check, independent of checklists, automatics etc.
There are those who have, and those who will. I sympathise with these pilots.