Captivity is not all that great for humans either.
Remember the 3 punks that sneak into a zoo, drunk and high and waited until after dark and taunted and teased the big CATS. Under normal conditions the enclose was high enough so the cats could not jump out, but under harassment one or two got the Adrenalin up and leaped 3 feet over what was considered a safe fence 12 feet high and got one or 2 of the punks.
One does not poke a stick at a chained pit bull, tease them enough and they can do amazing things to get loose.
No animal can be tamed be it a bear or human. Hang out with people that work in county Jails or State prisons and you will hear some tales that will give you the Willey Wases about prisoners that become more dangerous then alligator.
No Anamal is safe, be it dog, cat or ferret. They can be tamed to a point but who knows what will set off a pet to harm the family. Bears are by nature hunters of meat there is no such thing as a tame bear, lions, tigers or
Even TOTO that was know to snap at the film crew and Judy Garland making a movie.