I have never met a shy military leader who can unite an entire army under their command.
You haven't met many, then.
You wouldn't believe the amount of insecure, love-shy military men I've met. Being able to kill enemies doesn't mean you're not terrified to talk to people you find attractive. Yes, that's ridiculous. Does it change the fact that it happens all the time? Not one bit.
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And on that note, there is NOTHING IN THE WORLD contrary to the concept of "Lead them or fall" in being a person who can command well in a professional context, but is afraid to get close emotionally or be evaluated romantically/sexually! It's easy to think you're unattractive and your body parts are undesirable when naked, and/or to think you can't ever show who you really are, but to still take pride in getting your job done well and in your ability to form strong platonic bonds.
It's called being a person.
And it's actually highly rewarding to be involved in the roleplay of a protagonist who closely resembles a real person, with all the implied complexities and contradictions.
NPCs are not the only characters--the PC is a character, and really needs to be! The more options Bioware can include which allow us to define that character's development, rather than having only NPCs get character development, the more rewarding the story will be for the player because those little moments mean so much. Feeling like you get how the relationship of protagonist/NPC works, why it functions, why they make a good couple, is vital to loving the story in full!
And no, being shy does not always mean you're stammering about having a crush like a dorky teenager. People, adults, express shyness in many different ways--or don't express it, which makes it mean that much more when someone else picks up on it.
Having been the one person to pick up on a very hard-edged, strong individual's secret vulnerabilities and gentler sides, let me tell you, to be the only one who noticed he could ever be that way was special. Most only heard the sarcasm and saw the tough lean-and-mean exterior, honed from years of being the guy other guys thought would make an easy target. He learned to stare others down; to project aggression and confidence to avoid having to constantly prove to larger males with his fists, "yes, I CAN in fact make short work of you and your buddies in a fight." And yet because deep down, he thought himself unattractive and barely dared to look women in the eye (which most would read as him 'being a cold jerk' because he'd learned to conceal his shyness so that no one could use it to mock him), he could neither control his face nor stop blushing when I told him he was handsome.
Yet this in no way showed when he interacted with anyone else. His family and all those around him completely misunderstood his true nature. I have no doubt he could lead a battalion because he's great in a crisis. But that's different from being around someone he's attracted to. "Social interactions" are not all equal. Platonic social interactions and romantic social interactions are very, very different.
On a similar note, there's a reason why so many businessmen would go to a dominatrix. It's because life isn't as simple as "LEAD LEAD LEAD OMG LEAD NEVER ANY BREAK." Real people need balance. Real people are not 100% dominant in every area of their life, and the ones who seem the strongest in public are often quite frail in private. That's what it's like to be in love with a powerful leader--you see their insecurities, vulnerabilities, and humanities. You see behind the mask, you see the doubt, because with the right person is the only place such a strong person can let those intimacies out to play. And they *must* let them out in that context, because otherwise it's a shallow imitation of a real relationship.
And that complexity, those secret vulnerabilities, are what keeps the leader a real character instead of a stupid, flat, boring, awfully-written stick figure Mary Sue/Gary Stu that I have to imagine the NPC-writers feeling contempt for. A person who can never let down their walls, never ever, is headed for a mental breakdown, not victory and glory. The mental breakdown is pure realism. In real life, we have PTSD vets, not invulnerable badasses no one can relate to.
To be called on that very fact by an NPC fighting to get close to my emotionally shuttered protagonist would give me all kinds of character developmentgasms and storygasms and joygasms. So I'm really hoping the writers of DAI agree with my philosophy, and give us the chance to have those secret hidden sides. Yes, even inexperience and shyness when it comes to love, despite being quite capable in war.