They could probably just do that. Just move to a different career path and show support for an animal activist group; they would get a chance to talk about a cause they support, talk about their father on camera, and honor what so many people remember him for.

I am sure they have the pressure of expectation on the, but from how genuine they come across, they were inspired and shared their father's and mother's (don't forget her) love for animals.

I am not sure that can be faked so convincingly.

"I want to be a plumber!"

"Yeah, nah, fuck that mate"

Who doesn't want to work with animals? If I can I will go to Australia zoo and apply for a job there.