RP fights can be far more descriptive, and thus entertaining, than duels. As long as your opponent is mature enough to understand they can lose, RP fights are the best things about RPing, and since RPing is the best part of PS...
No! Maybe for you fighting is the best thing that you can find in game, but not for me and not for many other players! Im not a violent person IRL and Im not playing a violent character IG. My char trains her swords mostly to feel safe and to be able to defend herself when somebody attacks her.
But still.. I think game needs some villains, bad mages and such. In game I often complain or swear at the outlaws, but OOCly I think it's very good they are there, it makes the game more interesting. It makes up the topics to discuss about etc. For this reason I can even RP being scared of somebody who RPs being powerful although his char is not well trained, but only IN SOME CASES - when they put enough effort in making the character powerful and only if they don't make themselves invincible.
I actually met somebody like this only once, it was Xathen. There was a whole RP around him... there was a story and some preparations done before RP. There was even a quite balanced fight without rolling dices and arguing about the results (I didnt fight very actively and the whole fight was way to long for me but I saw that some people enjoyed it and I didnt want to spoil it). We knew that he can be defeated with the blue way and
those who had it, rp-ed using it against Xathen and we finally won (!!! it shows me OOC-ly that the char hasnt been created only to be there and to be powerful and smash other chars but also to entertain people and give them topics to speak about). I know IC-ly that Xathen did some bad things to other people, so now my char considers him a great risk. Maybe even not because of his super powers but because of his reputation that he worked on. I even bought blue way glyph and spent few trias on training my blue way in case I meet him again (Im backing up my eventual rp in the future).
But... when somebody attacks me just like this in the public place and starts with a killing blow, and then uses some super energy spell which blows up everyhing around, then sorry, I just can't take it too seriously. This is no RP. This is some stupid killing and trying to justify the super-forces with a cheap background. It happened to me before - few times Fesek's ex-wife was running after Fesek and me with her claymores writing about all this stabbing, hands cutting, using some super powerful spells, blah-blah-blah, and rolling without end. Sorry. This is no RP for me.
The real problem is that in standard live RPGs such characters are created and played by game masters... and I have a feeling that our Game Masters are never there. I never ever saw a light green or yellow labeled char. I play a lot but I had contact with GMs only twice in last 3 months. So we're left alone for ourselves and I think that's one of the reasons why people create these super-chars who don't have backup in stats. Or I dont know.. maybe they just like to feel powerful without paying any time to reach that?
And somebody has pointed out that not everybody has a time to train. Well, most of the players have jobs, schools, studies, families, pets, other hobbies... etc.

As I wrote in my first post - if you want to have 5 chars, why do you need play somebody who can easily kill others just like that? Play a farmer, librarian or a barmaid.