With rights comes responsibility. Few people would even be so foolish as to encourage unlimited freedom for apes, known for their strength and ferocity. Obviously, evolutionary thinking undergirds such a perspective. So is the DNA with similar genes accomplishing similar functions. But claims of cognitive abilities and emotional response of apes are notoriously subjective.
Trainers often develop deep bonds with their apes and overstate trivial responses.
Never, even after years of training, has an ape ever done anything that a human toddler couldn't learn quite easily. There are vast differences. The greatest gulf lies in the spiritual area. No ape has any awareness of right and wrong. They can be taught certain behaviors, but there is no moral comprehension in apes.