I guess it's the same difficulty as with reflective coatings - their efficiencies are far from 100%. Even if they manage to repulse most of the energy, some of

I guess it's the same difficulty as with reflective coatings - their efficiencies are far from 100%. Even if they manage to repulse most of the energy, some of it still goes through and roasts the missile. Also, this technology only seems to influence a laser beam passing by, not one about to hit head-on.