And why pick on insert delete when there is so much more low hanging fruit? Why not pick on F9-F12? Scroll lock?! Or the duplicated forward slashes or pipe key?
Don't need pipe key??? How do you suggest I use an OR condition (x || y) in most programming languages?
We warn the reader in advance that the proof presented here depends on a clever but highly unmotivated trick. -- Howard Anton, "Elementary Linear Algebra"