It's amazing to me how much effort is being put into saving these animals. There's no (immediate) benefit to us. They aren't raised for meat, fur or other products. They aren't working animals. They aren't pets.

Sure, it's possible that this research may one day assist humans with cancer, but that is a speculation and not known in advance - it could be useless for that cause.

People are just doing it because they care.

It's also wild to me that cancer can be spread at all. They mentioned biting, but is there any other way they can transfer it between individuals? I can't imagine it's airborne or waterborne.