Guns are often the better answer to small attack craft

Are guns or small missiles better for dealing with Iranian small boats?

Guns are preferable in most cases because they are cheaper and capable enough for the target set.

Guns are cheaper and sufficient for many small-boat threats. A navy gains little by consuming a high-value missile against a target that a gun can defeat. This is an economy-of-force choice rather than a claim that missiles never have a role. More dangerous targets may still require the greater reach or effect of a missile.