Florian was an overall weak Emperor, Drakon's immediate son whom assumed the Throne was a weak Emperor, Celene was a weak Empress.
There three weak rulers of Orlais since its inception! 
I'm just saying there is something of merit in a man who prides honor and personal strength over intrigue and the grand game, he strikes me as some one who would drag Orlais into the modern world with out the grand game, Not to mention if he actually succeeds in uniting the Nation behind that notion, something Drakon failed to do, he would be by far the most powerful Emperor in their history.
And you don't think having a Leader versed in military tactics helps? Calian was evident of that not being needed for a ruler but evidently it helps...
Celene doesn't mean weak to me. And we're taking of three rulers out of dozens.
A ruler should be first good at ruling. I don't mean that Gaspard won't be able so, but we dot know if he'll be better than Celene, or that he'll be a good one. Furthermore, he seems to me conservative enough to not change or destroy the Game.
Cailan's main problem wasn't that he didn't know nothing of military tactics, but that he was stubborn in not listening to Loghain.
My point wasn't that being a warrior/military expert might not help, but that if a ruler is capable enough and has capable generals, he doesn't necessarily need to be a warrior (that doesn't mean he should be completely inept in warfare, which we don't know if Celene is).
I'll respond to your successive posts in the morning, since it's late there.