I don't profess to be an expert in air defence systems, but what I can tell you is about the NASAMS system versus what you described, which is HIMARS, a vehicle-based, rocket-propelled precision strike weapon. Those are two different things.
All that is to say that it's nice to know that we're now delivering what our allies in Ukraine have asked for. The system is actually going to make a meaningful difference to their fight against Russia.