Because the medal pays for itself with just the daily coupon
Anything else are just a bonus, so you can't say it's not good. whatever the fook the daily mission thing is, it's not important, the important stuff are the survival coin boost, nine tail stat boost, minor stat boost, sweeping exp boost (since you are obviously not capped yet, this actually matters), 5 extra ranked (which gives you 140 extra monthly event pt per month)
I don't understand why you are hang up on a worthless feature when there are actually other valuable items in the medal.