He didn't approve of a two button mouse.
I could personally take a 20 button mouse, but we should be careful not to design mass market devices after our own nerd desires.
But right-click, less so. Gamers are a special case.
They play a game a lot, and are used to controllers with a dozen buttons, each having a specific function in the game.
General office workers are another story entirely.
Besides, Macs had optionally multi-button mice for ages, including under Jobs.