In Dream Park though, fighting and thievery are explicitly outlined as easier than the others. It says so in the first book, which is why um...Gryphon (is that the main character's last name?) is slotted as a thief I think when he's told to investigate the criminal shennanigans occuring in the park. He's not a gamer, he's given the easiest job to perform amongst some hardcore gamers who all had to get the approval of the party leader to get their slots in the newest and most difficult games. Anyways, it's not real combat. They're swinging holograms at actors and other holograms, and they stick their "picks" into things and it just happens. Dream Park isn't real, it's an amusement park - amusement would be pretty difficult if people were participating in real combat.
It's more like LARPing with the coolest, most expensive props you can imagine with Steven Spielberg running your game (because part of the way they make up the cost is by turning your game into a movie).