Some people do, but certainly not all.
Ultimately people's love of animals generally comes down to Superficial factors, like animals being cute, interesting or just in general fascinating, to conscious factors like animals providing a sense of importance and purpose in (for example) pet owners, to subconscious factors like the lack of judgement and a casual relationship.

Criminals who are given the task of tending to animals (for example cows) can wind up caring immensely for the animal because it doesn't judge the criminal for his past mistakes or even flaws, and instead responds to immediate actions. negative behavior has a negative response, positive behavior has a positive response. the simplicity is endearing.