Super naive take of him - both parts.
There are millions of dollars on the line. People are killed every day for thousands or even hundreds of dollars.
1. If the cheating was way too obvious (which I personally don't think it was, there was enough plausible deniability) and he was allowed to get away with it because players were scared of calling someone out for it, it's on the tournament organizers to do something about it - which would have jeopardized the entire tournament (think about all the players that he eliminated and how they might have legal recourse).
2. If something looks and feels wrong, the most likely explanation (and the simplest) is that there is indeed something wrong going on. Which is exactly why they created rules about standing specifically for this player. They knew something was wrong, but they couldn't stop the entire tournament because at that later stage it would have lead to total chaos with eliminated players (imagine losing a 250,000 dollar buy-in to someone later found to have been marking cards and cheating). The WSOP doing anything about this and admitting they found marked cards would lead to a flood of people asking for their buy-ins back, or threatening legal action, or the gaming commission getting involved. That's assuming they know what to look for and he doesn't have a novel way of marking these cards which is also totally possible.
How many of you would feel totally fine with someone at your home game flicking, bending, digging at the cards with their nails and constantly trying to get an up close look at the cards other players have?