By that logic, all troop transports should be converted Buccaneers, Danae, or Mules. Because if a hundred merchantmen come at your world behind a screen of a regiment of fighters, you can't attack because it might be a trade show.
Also, your target priority is...odd, to say the least. You'd really focus on and destroy a ship carrying a company of armored infantry instead of one carrying a company of BattleMechs? Or a combined-arms battalion? Note that the Seleucus is a tougher ship to kill than such transports as the Union, Seeker, Triumph, Fortress, and even such monsters as the Overlord or Excalibur. Are you seriously telling me that if you had the firepower to drop a Seleucus, you'd do that instead of eliminating one of those ships(and all the troops carried within) even faster?
To make my point yet again: the Seleucus is more durable than EVERY IS DropShip in 3057r except the Achilles and upgraded Intruder, and beats out several Clan ships far larger than itself as well. All to carry a measly two companies of conventional forces.
