Bingowings said:
He leads the run through Force of will.
Wedge and Biggs are both clearly lacking in confidence after the death of so many comrades
You are imagining things that aren't in the film to cover over the flaws (Not that I give a toss about those flaws myself). Luke leads the run because Red Leader says...
"Luke take reds 2 and 3, wait up here for my signal to make your run"
Hang on?!? A minute ago Red Leader was questioning Luke's ability to fly an X-Wing and is only reasured about his abilities when Red3 (Biggs) tells him he's okay. You have to assume he trusts Biggs' opinion from past missions, otherwise he'd be asking Biggs the same question. Then he's putting Luke in charge of Red3, a man he trusts?!?
And of course you are assuming that hanger bay exposition scene is in the film. Because for the first 20 years of Star Wars it wasn't. Unless you are saying that the SE is the definitive SW?*
*(;-) joking... thems fightin' words!)
All that aside, my general point is ROTJ has illogical things and so do the other two films. Lando saying the line...
"Someone must have told them about my little maneuver at the Battle of Taanab"
...is all the info we need in ROTJ, just as Luke saying...
"I used to bullseye womp rats in my T-16 back home, they're not much bigger than two meters"
...is all we need in ANH to establish his pilot credentials.