alt Hacker NewsI think you have a misapprehension of the genre here; science fiction isn't 'fiction with lots of science in it'; it's fiction that deals with potential future possibilities [1], and--deeper than that--fiction which uses those possibilities to explore explore current society/ideas.
There's no requirement to centrally feature technology, and it would be a weaker genre if there was.
Your link talks about how hard it is to define science fiction, so in some ways, I'm just putting my opinion out here on the internet as a data point. I'd say the Left Hand of Darkness is more science fiction than Little Women, but it's also more like the Hobbit than it is like Foundation, Ender's Game, Snow Crash, or even 1984.