This post strikes me as a bit arrogant. Doesn't seem like an easier problem just a different one. Not all problems have to do with the scale, that seems like a pretty narrow way to think of difficulty in engineering. What about latency? Some really smart people are involved with shaving microseconds off of stock transaction latency, so is that problem beneath you as well?
At the end of the day, for me it's about keeping an open mind, and solving problems that you face, so you can accomplish your goals. Doesn't matter if its a "worthy" problem or not. If you can't solve it or struggle to solve it, then its worthy.