The difference is, that with a "sim" noone has to send some toons into it, put auto and wait annoying 10-20mins. And that all guildies get the same reward. Same as rancor. Its sim-able, cause its only annoying to play, besides the rewards are much better for the guild in average, than before- and much better than HAAT btw..
If you say the whole point is to have fun, you have a strange idea of fun, when this autoplay is fun for you.. Only annoying waste of time with 50 GL into the guild.. The raids at this time are outdated.. so why not sim and save time?! There is no more fun into the raids , when your guild is strong enough.