I disagree.
Replicants are not machines, they are genetically engineered humans.
In PKD's original story
Do Androids Dream of Electric Sheep he wrote about androids which were machines.
I think the ultimate issue is bigger: What do we do with genetic engineering? When we apply it to humans the question may have additional issues but it is still the same question.
Are
terminator seeds immoral?
The Pros and Cons of Genetically Modified Seeds
I didn’t mean machines in the literal sense.
P.K. Dick told a story about what inspired Do Androids Dream of Electric Sheep? He was reading the diaries of a Nazi officer at one of the death camps, who was complaining that he could not sleep at night because of the crying children. Here was a guy murdering people, and he was annoyed that the screams of the dying children were keeping him up at night. Dick rightly thought: This person is no longer human. He has become something less than human.
That is the inspiration behind DADoES and BLADE RUNNER: How our technology, society, and our own appetites rob us of our humanity. We have become “ghosts in the machine” as Koestler put it. We are lost in the machinery of our own making.
So Deckard, Gaff, Bryant, Tyrell … they are all less than human. Deckard kills because it’s his job, because society dictates it. Society refuses to acknowledge the replicants as living beings because it could no longer enslave them.
Tyrell says he aims to make replicants “more human than human,” but the humans in the story have become less. They are simply machines, following their programming.
The replicants, by contrast, really have become more human than human. The love. They fight. They rage. They appreciate art and poetry and even toys. They are alive in ways the actual humans are not.
THAT is the theme of BLADE RUNNER.
And it is also why Scott’s continued attempt to make Deckard a replicant are a cheap gimmick that robs the story of a lot of its pathos.