The cool thing about laser weapons is they're (theoretically) better at protecting other objects than themselves. A missile flying at the laser weapon has a very small cross-section, warheads tend to be well armored (both to protect from missile defense as well as increase penetration before it explodes), and the air blowing passed the nose helps to cool it faster than any other part (and laser weapons depend almost entirely on transferring heat to the target), whereas a missile flying perpendicular to the beam has more exposed surface area, that surface area is less armored, there are more critical aerodynamic surfaces exposed, and there is less cooling effect from relative air movement.
So, if you know where the emitter is, you can probably take it out easily, especially with hypersonics. I imagine we would also see more polished-mirror surfaces on missiles if laser weapons actually become a thing. On top of that, they require immense amounts of power, giving another angle for sabotage.
He would take credit for it tho