What I'm saying is the same thing as you are saying. If time savers are ok, why not let people buy xp chunks? Why not let people buy their way to 80?
Anyway, no, not reaching level 80 faster than anyone else. Rather, reaching 80 as soon as possible, considering the limitations of the individual player. Those two are not the same thing: in the first, you are competing with everyone else (which is something that you will very likely lose), in the second, you are competing against yourself, which is usually a healthy thing. But not when you can "win" over yourself by paying money.
You are correct that reaching level 80 is not the goal. But it is definitely a goal for many players. Even more so when you are playing your 13th character and you have seen all the starting stories (really despite the branches it's not that different) and you only care about reaching full potential.
The "rush to max level" mindset might be in a minority here on GWO (though I actually doubt that it will be once people actually play the game; some posters here are incredibly self deluded and change opinions seemingly overnight), but in the general MMO populace it is definitely a very common way of thinking.