I ask this out of sheer curiosity.
For pasting - why wasn't Ctrl+v made as a shortcut - which is standard - instead of Ctrl+Shift+v - which is not standard?
Same goes with so many other shortcuts (which are in common with other platforms). For scrolling up - Shift+PgUp instead of PgUp, as another example.
Since this is deliberate, of course, then I am sure there is a logical explanation for it?
Ctrl-V
on Unix predates the GUI paste function from Xerox, I think. I suppose the same goes for the others.