To that end, I submit that we separate the what from the why. What it is that he suggests, ought to be evaluated, independent of the reasoning he gives;
Thing is, though, the 'reasoning he gives' is ludicrous. We are getting benefits from our soace operations but not in many forms that could be pirated by orbital boarders, justifying a repelling force in place.
So the 'why' is pretty clearly
Cruz being a Trumpian butt-snorkel. If he does, in fact, have a better why, then he should have led with that.