I know what you mean, its the same reason I do not have a kindle or buy e-books in general: With a physical book I take the time to sit down and read what is written, but on a screen I find myself skimming through to get the key points.
Sometimes, efficiency is the least important thing.
I love my kobo for the fact that I can carry it with me everywhere, but navigation is so slow that I'm not tempted to switch books or even quick scan them. I only have to charge it every 3-4 days (heavy readings sessions). I only use it for fiction and text heavy books.
It has my whole library on it and I open it everytime I'm waiting for something.
Sometimes, efficiency is the least important thing.