The problem is most players have about 1 job at max level, which means that they wont get to experience all contents.
hah....hahaha....What game are you playing? I know people that have played the game for ONLY 1 month and have 3-4 maxed classes. So yah the only way you have only 1 class leveled is if you just sit there doing nothing all day or just plan dont play the game, and if you are not playing the game..why do you care?