All I'm saying is that it's survival bias because we can only describe the cheaters that got caught.
If it took this much and this long for these guys to get banned from a small percentage of the country's rooms, I imagine there's a whole other subsample of cheaters that might have different behavior patterns.
I didn't even know we had to worry about marked cards. How can there be so many cameras and so much floor staff and no one's so much glancing at the relatively small number of games with $10k+ on the table or at least occasionally running random audits of the cards!
I mean, I know the answer is because it doesn't affect the house's money, but still... For as much cheating as there is online, at least the sites keep up an appearance that they investigate and drop the hammer where possible.
Players aren't even vigilant with basic things like rolling the deck or dealers keeping cards low and neither is the house. So when someone is actually cheating almost nobody is going to notice.