Grinding doesn't teach you to run endgame content >_> because its not designed that way. At best it teaches you how to string combos together, but any idiot can learn that within 20 mins. The problem isnt how long it takes, the problem is the lack of quality and lack of content. And by quality, I mean difficulty that would actually prepare someone for endgame content. Even mini ifrit and mini garuda require no actual strategy. It is utterly pointless to increase the exp curve unless they add meaningful content. Making it take longer just for the hell of it is just lame. There needs to be something there first to justify it, otherwise its just a time-sink and a grindfest.