In the opening sequence of The Last Jedi, we observe
a squadron of Resistance bombers flying in fairly close formation towards the First Order dreadnaught. Arguably, the bombers arm their ordnance quite prematurely and fly irresponsibly close to each other, the result being that when one ship is destroyed it practically wipes out the whole squadron.
So my question is:
Why did the Resistance bombers fly in such close formation and arm their bombs so early?
EDIT: I don't see this as a duplicate of Why arm the bombs early? because this question primarily addresses the flying formation of the squadron.