Doesn't seem like a big deal, I'm trying to think of a situation where I need the other hand to be free while paging or moving to end of the line.

> These keys are for some people the most common keys used for fast nevigation in code and documents.

Seems like a personal preference. I have a working trackpad so I almost never use them. Also, home/end on a thinkpad are out of reach anyway. And what's the point of 'insert' ?

> Ctrl+C / Ctrl+V are used far less often,

I use these constantly, I don't remember touching home/end ever, pg up/dwn maybe by accident.