Pure RNG is the worst thing ever.

[Risvertasashi]

I refuse to believe someone could be dumb enough to think RNG makes anything fair or even.
There's nothing fair about gettings something in 16 hours that someone else got in 1 minute.

You have to consider it from a system designer's perspective. From a high level view... Say, for example, you design something to have a 2% drop rate, with a frequency that, on average, someone will get the drop after 3 hours of input. The statistics are the same for everyone. So to some, for example Hiroshi_Minagawa, this seems equal and fair.

The problem is we are, as you point out, individuals. To the individual experience, RNG can be very cruel. The typical case and bell curve distribution and all of that don't matter; what matters to a player is how their individual plot falls on the graph. And pure RNG not only can, but will, generate some very cruel player experiences.