What's the "false reassurance" in this? It isn't the SDI, and plus, times have changed since then, launching and maintaining a constellation of a few hundred satellites communicating over radio and inter-satellite lasers is realistic now, that part is already in commercial use. They also aren't talking about space based interceptors.

Tracking hypersonics from orbit is relatively straightforward, they get hot enough to produce plasma, and thus will be very obvious in infrared. The challenge isn't tracking, it's reacting fast enough to the information.