Sci Fi was in a renewed era and that probably made the risk seem less.
This is something else I was thinking about-
So I just watched Final Cut tonight. This is most definitely science fiction, however would the mainstream audiences have expected the subtle science fiction of Blade Runner, or something more "Star Trek/Star Wars-ish".
Let me try to clarify what I mean here-
It's 37 years in the future (1982-2019), there are flying cars, HUGE skyscraper buildings and cool looking gadgets like the VK and Esper machines...
BUT-
-The film takes place in Los Angeles on Earth
not in outer space or another planet.
-Everyone still uses guns that fire (albeit powerful) bullets
not laser guns.
-The "robots" in the film look and act just like people. In fact were it not for their extraordinary strength, they would be indistinguishable from humans. Of course this was the point...
But were the audiences of '82 able to understand this? "Robots" (even ones that look human ala "Westworld") previously would have gears and circuits. When disabled they would clunk around and give off sparks. Not bleed real blood.
(Even Luke Skywalker's artificial hand didn't bleed, it gave off sparks.

)
-The city looks like what I would imagine downtown Tokyo looks like. Not some futuristic version of Los Angeles (like say the future city of Logan's Run).
So my point is with Harrison Ford of Star Wars fame in the lead, were the audiences expecting a Star Wars like futuristic setting?
Getting back to Deckard's character- Deckard is an anti-hero. Unlike the main roles of those other 1982 films like Rocky III or Firefox for instance- You have someone like Clint Eastwood who "gets the job done" and kicks butt in the process. Or classic Rocky- the chips are down and the hero looks as if he has reached his lowest point, but comes from behind and turns up a win.
Audiences were used to seeing Ford in that larger than life, swashbuckling hero role. Deckard is not that role.
It makes me wonder if a movie like Blade Runner would have done better in the mid Seventies, when movies like Taxi Driver and The Godfather (with anti heroes and bloody shootouts) were Oscar material.
Kevin