You said — a single mouse button is sooo limiting...
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Hmmm..., from what I’ve seen, there are about six separate actions (or “buttons” if you will) on my mouse... (that’s the normal mouse that Apple has...).
I don’t know what mouse you are using.... LOL...
http://www.apple.com/mightymouse/
Mouse? What's that? I have a drawer full of those rat-like thingys that came with various Macs, and frankly, they have never been used -- not once.
With the great "Multi-Touch" keypad on my Macbook Pro, I never use a mouse -- including for creating extremely complex technical graphics -- including CAD designs and multi-layered historic maps.
Of course, you obviously never looked at a Mac honestly enough to discover that functions like "right-clicking" are trivial (as in simple "preference" settings) to set up on a Mac...