Its because: "RNG bad so lets delete RNG; no need to replace it coz RNG bad"
RNG is a fundamental part of RPGs, so hard pass. Unless of course what we really want is an economic simulation that is distinguishable from magic but vaguely predictable. Such as having to look for stuff in specific types of economies or specific political states. Luckily we have that already. Complexity can luckily also be modelled by RNG, thereby saving developer time that could be better used creating cockpit cats and/or fluffy dice.
S