Yes, but how does a thing wear if it's 100% efficient? Wear results from the translation of input energy into friction. Efficiency is the measure of how much input energy is translated into useful work. The two are opposite concepts.

If my efficiency doesn't change with or without lube that means the lube is having no effect on frictional losses which means it has nothing to do with wear.

Now the real answer is take it out of the lab, dump some sand, and dirt, and whatnot in there and see how it changes. Though I suspect that the results may be counterintuitive: dry lubes are designed to shed contaminants. A non-lubed chain will have a very similar performance. The question is how much does the addition of non-stick additives improve the shedding properties of the chain? Is it enough to offset the lube itself?

Wet lube of course is to help protect the chain from oxidation or other chemical reactions and to be durable under harsher conditions.