Honestly, RNG is shit and at the very best feeds a gambling addiction that shouldn't be supported in the first place. It doesn't make people run content considerably more often on average, it only cross-subsidizes the instant gratification of the lucky at the cost of the unlucky and completely screws up any effort to reward ratio, thereby devaluing effort as such.
It's a relic from the time when developers didn't know better and should die the death it deserves. Seriously, fuck that design PoS.