You are responsible for what you can do. Of course you're not responsible for the firmware, but you have a responsibility to update it if it needs it. Balance the benefits WU gives you versus the risk in shutting it off for the average mouth breather; you can't save everyone but the chance of a compromise through WU is much lower than the risk of running an un-patched Windows machine. Leaving WU in its default state is the responsible thing to do, and that's the kind of responsibility I'm talking about. I don't expect the average consumer to be able to find and patch zero-days, but I DO expect them to know enough to not click on "punch the monkey" ads on the web, to know enough to install an anti-malware program, to know enough not to open attachments from people you don't know, to not run pirated software downloaded from some site in Elbonia, and to generally not be a fucking idiot. This is a perfectly reasonable set of expectations. The people who cause issues for others are the ones who don't do all that, who click on every banner ad in sight like a crack-addicted monkey hitting a lever, who send money to Nigerian princes, and are generally stupid enough to make people wonder how they tie their shoes. These are also the people who buy the shiny without knowing anything about how it works.
And how about not buying the fucking fridge if that's the way you feel about it? Nobody's got a gun to your head (that I know about, anyway)