Tasted much ass have you?
I can think of numerous other reasons for micro-brews. The first of which is the all mighty dollar.
I personally try different beers to see what they taste like, how they work with various foods, smell, coloring, etc. None of that changes the ultimate end though....an altered state of being. Taste is merely one component of the brew.
But I'm sure you're right, there are some people out there that deviate from the norm....there always is in everything. After all, that's what keeps things interesting!