I know I kid.
Is it a big moment? It's a moment for sure, but no bigger than it needs to be for the death of the third to last Rebel fighters left standing out of a group of many. Even if he's a nameless pilot, the fact that his death means there are only two left for the attack run is enough for a dramatic beat.
If we're going by the SE and Biggs is Luke's best friend from back home, the moment probably isn't as big as it should be (Luke's reaction I mean).