Sean wasn’t all wrong. When it came down to it, he really could be useful fighting anybody using advanced technology. One big electromagnetic pulse could take out computers—assuming they weren’t protected. The robots we fought were pretty resistant to EMP’s, as I remembered it. They weren’t entirely resistant though, and it might be that he could put more energy into a pulse than a roachbot had available.
For that matter, if the ships were made even partially of metal, he could throw them around, or possibly make them structurally unsound.
The only reason I wouldn’t put him on the front lines is because they could take him out practically instantly.