Yeah, it's a lot safer to start off that way. They don't want to find out you're forgetful about locking cages on large predators...
I can remember some years back hearing about a gal (@ EATM, Moorpark CA) who lost a good part of her face when a cage was left unlocked to one of their big cats.
It's a bit like riding a motorcycle...even if it's not your fault, you can be royally messed up.