That's a great point. However, you're using the idiom of the tail wagging the dog incorrectly. The tail wagging the dog usually means something important or influential being controlled by something less so. In other words, the tail would be wagging the dog if I wrote a blog post that made people change their opinions on the SAT.
The movement to shit-can standardized tests was far bigger than MIT or any one institution and was part of a broader political trend whereby these sorts of institutions have been adopting particular positions. Hence MIT is the tail in this case.
