Do you also turn off autocorrect? As for why I’m not proofreading my entries? I am. But typos happen. Try to put yourself into the shoes of the average office drone or consumer just using a PC as a tool. I’m pretty sure I’ve harped on this before, but most people aren’t experts or enthusiasts, they just want a working computer that’s as simple to use as possible. The benefits of a case sensitive-file system are far outweighed by how susceptible it is to user error.