The TIEs can also contribute by getting in the way. If the spot your opponent is trying to land already has a TIE sitting in it, they can't fully complete the maneuver and lose their normal action as a result. Academy Pilots move before most ships due to their low initiative, so if you can predict where your opponent is going you can deliberately block them.
As @ScummyRebel says, the targeting computers are almost certainly not worth it on generic TIE/lns.