First, I think you mean the Desert Eagle .50, and there is a "bigger" handgun caliber, .60, namely the .600 Nitro Express...Although to be honest anything above .45 will be insanely inaccurate and will have extreme recoil, thus becoming mostly useless despite what all the Counter Strike fanboys/girls think.
But back to the topic. Here you're mixing 2 very different things IMO, Single Player RPGs and MMORPGS. The turn based combat/one click combat actually DOES work in single player RPGs, this is because it's a different scenario: it's generally you and/or your team of relatively weak characters vs. a giant behemoth, or several smaller enemies with their own weaknesses and strengths. There's actually some strategy involved in combat like this, at least up to a point. You have to find out your enemy's weakness and exploit it, you have to decide whether or not to take another turn attacking and risking having a character killed, or if it's just better to heal up and wait another round, or pick which enemy to eliminate first, etc... It's like a dumbed down version of Chess with CGI graphics and a storyline... Also in decent single player RPGs there's an immersive or at least interesting storyline to follow where you are the main character, generally filled with awe striking prerendered cinematics. It gives you the feeling of "belonging", like being a main character in a movie or novel. This all goes out the window with PvP in MMOs. The story is null in most cases and awkwardly "attached on" in the remaining cases, and whatever remnant of strategy was still remaining is kicked out to give room for "two guys throwing all they have at each other seeing who dies first", which is basically translated to "who has the highest level/best items" or as a tie breaker "who has the most potions", which all really boils down to "who spent the most time grinding their lives away in this game"... You don't really need graphics of any kind for that, you need a stopwatch.
Also, I think you're mixing "coarse" with "mincing words", which I don't.