Comment by rhdunn

In some cases you may need the keyboard accessibility.

- Your mouse/trackpad breaks or isn't recognized?

- The right mouse button for your trackpad isn't working for some reason (e.g. you spilled a drink on it). It should still be possible to use the context menu keyboard button to bring up the context menu.

- Your hands are on the keyboard (typing a document, email, code, etc.) and it slows you down to move to the mouse/trackpad to perform an operation such as copying/pasting text or bringing up the spell checker context menu actions so you want to do those with the keyboard to keep yourself in the flow.

Most often you'll learn keyboard shortcuts/interactions for your workflow then expand out as and when you need them. Sure, knowing all shortcuts and interactions is fairly limited, but the majority of people will know how to cut/copy/paste with the keyboard as those are common operations.