Actually, as both a windows, and macos user (among other OSes) I must say that I see nothing particularly convenient about being able to right click to select copy and/or paste. It is much faster to use the keyboard shortcuts than to have to be bothered with the mouse. Let's compare the difference between copying and pasting when using a PC and a Mac.

Copy - Control + c
Cut - Control + x
Paste - Control + v

Copy - Command + c
Cut - Command + x
Paste - Command + v

If anything, the command key is located in a slightly more convenient place on the keyboard so it is actually easier to copy and paste on a mac than on a pc.... but that's just nitpicking.