I can understand why you would think that, but it's hard to justify it when you're capable of doing many F7s per day with the fatigue system in place. In a full party, you can do twice as many F7s as you would solo. And rather than focus on the Item Mall aspect, I look to the other parts of the game. With the most recent updates, you can see that they are orienting the game to focus on party play rather than everyone soloing everything. The examples are much more plentiful when you examine it this way; the newest dungeons are much more difficult than previous PvE experiences in the form of Black Claw Nest. This dungeon is impossible to complete without the use of teamwork and group effort. The new Red Fox Delta dungeon is also very high in difficulty for its level range. The most recent changes to the game, and I argue that the F7 one is also exemplary of this in the fatigue system--as well as being a fix for the issues F7 had presented before. This is healthy for the game, to encourage the player base to play the game together. This is an MMORPG and party play is one of the most important things in one. With the most recent updates, players are deterred from soloing all the time and must work to get a party.personally, i see this as a bit of a bull-_- excuse. yes its a luxury. but ya know, that gets to be like fox saying "a fair and balanced discussion" when they shove it in your face and change gameplay mechanics to insane. in fact, i may be going out on a limb here, but i think they need to stop fiddling with the item mall until they get the damn WHOLE REST OF THE GAME fixed. and before anyone says it, yes i'm mad bros, cause their screwing up very visibly.
That being my point for the fatigue system, the Fatigue Potions definitely work as a luxury item in its stead. Yes, you can buy yourself a boost if you so desire--just as you can buy an experience boosting potion or Jack's Bean. But you are also extremely capable of doing it without it, and it's still quite viable for leveling.