Not really. He's the one who doesn't generally shoot, so when he has to it's all the more poignant. He's the advisor, the humanitarian (they all are, in a way, but his medicine makes him qualified in a unique way for it.). He sees things from a different point of view than command. An outsider looking in and able to offer something the leader and logician don't.
Worked great in the Aubrey–Maturin series. And in The Enemy Below.
These are all good points. And as Lukas Kendall once said,
Master and Commander is a great
Star Trek movie.
The thing is, you always have to find something for the regulars to do. It's not a problem in most TV shows; they see a doctor only when they need one. But on
Star Trek, you find yourself wondering why Spock needed the ship's chief surgeon to come along in "The Galileo Seven." And why is our surgeon on the bridge so much? Or going ashore on so many planets?
In universe, it comes down to McCoy's rank, his friendship with Kirk, and the "wild west" or "
far side of the world" aspect of
Star Trek, which gives Kirk so much leeway to do whatever he likes, to operate casually with his buddies, and which is utterly
unlike the U.S. Navy that Starfleet often seems to symbolize. And I admit, it does work in TOS. We love the power and freedom Kirk has, as opposed to being on a string all the time.
But the "problem" of putting McCoy in the action for
who he is rather than
what he does would be exponentially magnified in the
classic-cast film series, because by then, the entire legacy cast of aging supporting actors was considered indispensable for every movie. Chekov needs dialogue. Uhura has to say something here. What can Sulu be doing in ST3 to teach us (suddenly) that he is the coolest guy ever? "Don't call me tiny."
It hung a huge lantern on the fact that, in a realistic telling of a given plot, these are not the individuals who would still be on this bridge together doing this stuff. Making it worse, the supporting actors were rusty as hell, and they put their whole hammy hearts into each little line that should have been tossed off casually. It got cringey at times. And McCoy services photon torpedo electronics with Spock? Why not the responsible weapons officer? Okay, rant over.
