Try it and you'll quickly see why this doesn't work.
That's your opinion. My opinion is you don't deserve it if you can't beat a challenge. Mindlessly collecting 99 items that drop every 5min at best is not my idea of a challenge, it's just tedious, as is every single trial out there. It's a system that was designed to stretch out FFXI's lifetime by endless monotony.
While, in general, I agree with your sentiment, I'm guessing you can also do KS99s with a group of 3~4 people by now. I didn't try since level 80, but even then it was a lot easier.