Social progress is a funny thing - everybody alive thinks they're exactly as progressive as the world around them and the fact that the world is now more progressive than it was when they were younger does not mean that they were a backward part of a backward world, it means they were one of the enlightened ones.
Blade Runner is so old that we live in the distant future it imagined. But a lot of us grew up in that distant past and it's normal to us. So anything that happened that was normal then must be normal now, right? This is why you have a racist grandma. Four years after Blade Runner:
Four years after Blade Runner:
It wasn't a caveat at the time. We were still agog over the brilliance of Last Tango in Paris.