Really? Sometimes it seems those insiders can't wait to haul someone out!
I think they only man the tower in the smaller high limit lot (also adjoins the closed off VIP lot) regularly, maybe that other one is only during peak hours or events? The former feels super safe, I think the larger regular lot feels odd because of the trailers/buses that block your sight and the fact that it slopes away from the casino, so it really feels isolated.
What the man said about Walmart is true though, they're probably just as, or more, likely to be grounds of a crime. Lots of people go to the casino and they do somehow manage to LOSE money, not gain money.