OTOH it's the most important position on the team which makes it the most interesting position battle on the team.
Most important, yes, but not more important than the rest of the team combined. Yet, every time any team in football has a potential QB battle no other position even matters. The defensive tackle may not be the quarterback, but try playing without one. Too many key position battles to focus so much on just one. Who is the field goal kicker, we look shaky as hell there. The snaps and holds are a little shaky, too. This stuff wins football games. They deserve to be scrutinized by no lifers on the internet just like the glamour positions.
And we're jumping the gun saying they can all do it.
I believe if named starter, any of the three eligible QBs could run this offense at a high level. Do you have reason to think otherwise?