First of all, go back and be sure to actually read my post before commenting, because you will see that I never gave ADVICE to anyone and the grizzly guy and fatal attraction is EXACTLY what leads to people getting eaten by animals because they LOVE the animals they don't RESPECT them. Those people, as I said in my post, are trying to have a human/pet relationship with a wild animal, which you cannot have unless it is as a ticking time bomb, whether you raised them from birth or not, their nature is still the same and no matter what we do we cannot change the social rules that they follow and that are ingrained in their DNA.
The guy in the video is interacting with those lions as a lion not as a person. He had to integrate, slowly, into that group. Although he stands on two feet, he acts and follows the rules as a lion would, which is why he is tolerated. Once he steps over the line and tries to act as a human would, which would be trying to act as a dominant lion, he will be issuing a challenge and that challenge would be met, just as with any other lion, only he, as a human, cannot meet that challenge and survive it. Many actuall lions can't make a dominant challenge and survive it.
When interacting with animals it is never about love, it is about respect. When people love animals, is when we start to expect things from them that we have no right to expect and we cannot necessarily expect them to return that love the same way, as they are not human and do not form the same type of attachments that we do. Yes, they can love us in their own way, but it is not the same as human love, because of their very nature.
Ever heard of Dian Fossey (funny, I'm pretty sure I mentioned her in my post as well), who integrated with gorrillas to study them? A silverback could have literally ripped her to pieces anytime it wanted to, and would have, have no doubt about that, had she ever over stepped her bounds. BUT, she integrated with them slowly, was accepted into their group, and behaved as a gorilla would and followed their rules, not hers.
And no, you don't have to have a degree in animal behavior to interact properly with an animal. You can simply observe them, watch them interact and learn to mimic their behavior. There are many people out there who have done this...some famous horse trainers for example, who have completely changed the way we interact and train horses from the days when we used to "break" them. They learned how to imitate the stallion/lead horse and start their own "herd".