To some degree, I feel that way about data in general, though in most situations an excess of data is unlikely to be harmful even if it's not helpful. However, I feel much much more strongly any time data is being collected via high-stakes tests, especially when that data will be used to make decisions about people's livelihoods, and most especially when there are guaranteed to be substantial rewards for anyone who successfully manipulates or misrepresents that data.
Data is a necessary but insufficient component of any working democracy. But it pales in significance next to the necessity of a well-educated populace that's actually capable of using data to make informed and rational choices in it's own best interests, and an electoral system that allows such choices to be made.
I agree that such tests would just be a more structured extension of what we do already. The problem, as I see it, is that what we do already is not well thought out or effective.