Maybe things are different in the US (where maybe peoples personalities are extra rigid because self image and the concept of identity is so amplified), but the people I tend to interact with are usually much more subtle than this, and can easily shift from looking or acting like one archetype to another with a little empathetic communication, without me having to characterize them into a framwork, as an obstacle I need to systematically figure out a way around.

I agree. When you’re seeking to characterize unpleasant people you work with as “the dictator” or “the diva”, maybe you should look in the mirror and see “the reductionist” and try empathizing with people who anger you and treating them like human beings for a minute first. What feedback would they say about you?

Talk about rigid ... it's humor.

Is it a humourous address to the issue with some real options for resolution such as introspection, or a humourous pisstakecwhich does nothing more than reinforce that people can be pigeonholed and you can deal with them without understanding what makes them behave a particular way towards you?

Even if the site is, not all of the responses are. People really do think this way!