I wasn't arguing against Demon's Souls focus on patience, just that this is a poor example of the significant role patience plays in the game, as while it is indeed likely the most extreme example of patient gameplay rewarding the player in some respect, it is also the most shallow, and fundamentally disjointed from the numerous other gameplay components that make up Demon's Souls. It is the equivalent of grinding your character against weak, useless enemies for hours upon hours in an RPG, just so you are ahead of the curve in strength and power for later battles. An option, and reward of patience, but not necessarily a noteworthy one.
The many other boss fights, required and optional, are much better examples of some of the extreme degrees of patience players can apply. As you will be well aware, outside of maybe only one or two fights, all of the bosses can be beaten with little health loss and on the first try, on the condition the player applies patience and tactics to their manner of play, and does not rush in wildly.
Demon's Soul, as you have said, is a game about patience, not trial and error, and continously rewards patient gameplay. However, as said, I dont consider the dragon bridge battle a good example of this.