When you're writing fiction, you have to choose which elements to emphasize to get your point across. Blade Runner wanted to be about questions along the bounda

When you're writing fiction, you have to choose which elements to emphasize to get your point across. Blade Runner wanted to be about questions along the boundary of "What is it to be human?" It didn't want to be about everyday technology (though it had to pay some lip service to that). So it didn't want to invest the reader's mental energy in the replacement for phone booths. (I think the author's point still stands, but that example doesn't support it).