Why should I be excited for Grind Parties?

[Wolfie]

But that's the thing, there was ALWAYS something to do if you weren't grinding. Even people that never played blm did sleepga2 quest, aspire, and countless more. Hell I did the adventurer's coupon for 50gil for every single time i made a new character, mules, etc. I had 3 accounts and 4 characters total, 2 mules and 2 mains. SE got a pile of money from me every month... People would make new characters just to do quests. And not just for money, but fun, too.

And why wouldn't SE want to fold that "grinding" experience in with the fun stuff, so that people didn't have to spend any time doing something boring just so they could get to the fun stuff?