Imagine a situation where your crew and you in a cargo ship full after mining, then some pirates come to steal it, they totally overpower you with their 2 big ass ships. so you wanna escape but you're too big and clumsy to out-maneuver them, so you detach 3 cargo bays from your ship, and every one of them is a seperate ship with a bridge that tries to escape. and now even if one or two of the parts captured, the rest escaped and you haven't lost all of your precious cargo.
Or imagine that function in a combat, when two huge ships start fighting each other, then one of them transforms into 4 ships that maneuvering faster and attacking from different sides while the big ship needs to power shields all around the ship and shoot 4 fast moving targets!
What you think about it? you think this level of building is possible in DU?