Curly had it
It's rare, even after Day 1, not to have a pulse on the game to the point where you know of at least one player that most of town thinks is town. Also correct in a lot of ways about how it functions as a pseudo-protective role.
If you are a clear, the doc is already flipped, and the watcher sees someone target you, then that information is huge. Either the clear dies and you lynch the guy, or the clear lives and claims roleblocked and you lynch the guy. You don't play around Ninja the same way you don't play around tailor and both are horrific roles anyway.