Anthropomorphism. Cats' predator instinct has been cultivated in their DNA for thousands of years, doesn't mean they're sadistic. They can't resist their prey drive.
They don't even know the things they're hunting are even food, they learn from tasting it, and they particularly enjoy playing with the suffering critter as a form of pleasure. I have watched cats prolongue the prey's suffering and refuse to let them die for "more fun", drinking in their feelings and junk by staring at their last moments in the eye, then following that they don't even eat it.
Sadism and Ruthlessness may be more pathological, but when you compare the critters in questions' sadistic drives to humanities it shows similarities.
At the very least for Spatial's point of Intelligence = Goodness, I really don't see it. There are values to selfishness and altruism depending on the environment, and many things on the higher IQ spectrum in nature partake in it. Even his own idols tend to err towards selfishness and ruthlessness, and even Sadism in Andrew Tate's case, so his point seems odd to me from him in particular.
Well your version of what you think intelligence here is is factually statistically less once cruelty is in the mix. Mean people can be that but it is less common