I don't think the answer is to throw up our hands and say, "oh well, I guess security is fundamentally incompatible with usability in consumer electronics; cave

I don't think the answer is to throw up our hands and say, "oh well, I guess security is fundamentally incompatible with usability in consumer electronics; caveat emptor is the best we can do." I concede there's a tension between security and usability (and that compromising on usability to achieve security makes your product less appealing), but we should demand that companies find better ways to design around that tension, instead of making the bare minimum concessions to security and adopting a "blame the user" mentality.