That's how rng based games work. It's not about grinding for days and weeks its about finding the fastest and most efficient way to lvl up. Hence the treasure cave. I wasn't a fan of it either until I realized that this is all this game is... It's a grind session. If bungie didn't want that they shouldn't have made it rng. And if people don't want it they should stop playing destiny. Because it doesn't look like its gunna change any time soon.