Humans have moral agency whereas animals have little or none. Animals must listen to their instincts, whereas humans get a choice.
That choice is more important to some people, less important to others.
This depends on which animals people consider to be moral subjects and therefore worthy of moral consideration, rights, and protections.
Some people (vegans) consider all animals as moral subjects. Some people (pescatarians) may consider most animals as moral subjects, but not certain ones like fish.
Most people consider some animals like dogs, cats, and horses, as moral subjects, and not others like cows, chickens, and pigs.
These definitions are unconsciously arrived at by sociocultural factors, but some people consciously arrive at them.
That choice is more important to some people, less important to others.
This depends on which animals people consider to be moral subjects and therefore worthy of moral consideration, rights, and protections.
Some people (vegans) consider all animals as moral subjects. Some people (pescatarians) may consider most animals as moral subjects, but not certain ones like fish.
Most people consider some animals like dogs, cats, and horses, as moral subjects, and not others like cows, chickens, and pigs.
These definitions are unconsciously arrived at by sociocultural factors, but some people consciously arrive at them.