So, we build a 1 mile ship to counter a 5 mile ship. Why not build a ship of exactly that length, or maybe double the size, to counter this ship? That didn't work for the Imperial Navy, as one fighter took out the bridge and brought the ship crashing into the Death Star. Imagine that happening in Star Trek.
An enemy ship smashes into your bridge, and, considering, that you left the bridge far more vulnerable to attack, as you idiotically put in openings on either side of the bridge structure, there goes your expensive penis waving project.