It is an evolutionary advantage.
If one would love other animals more than humans, they would be less likely to procreate and would be less reluctant to approach some more dangerous animals, which would in turn increase their chances of dying.
Humans and all other animals are mostly incapable of thinking outside of those predetermined values and presets.
I actually value computers more than either, although I cannot hug them and they are largely incapable of performing comedy.
I also cannot eat them.
It is also funny that people think children are born as blank slates, while they are not.
Their entire personality is predetermined in the womb, long before birth.
Male fetuses, for example get a testosterone burst somewhere in the forming of them, which makes them male.
This makes them more prone to extreme deviations from the norm, because testosterone influences the brain lots, too.
Or even less extreme deviations from the norm, such as left-handedness.
But I digress lots.
I know why someone would think that, but I do not think that, so, as with all human behaviour, I can only rationally approach it with evolutionary theories but I cannot sympathize, much less empathize.
I like science, it is so useful.