Like I said i think it is a bias against creating resources from nothing. I mean look at bees, you either get 1/4 an ingot per comb with Extra bees metalic or 1/9 with magic bees metalic lines. They both require a lot of time and effort to actually get even with gendustry which makes breeding very easy. And to get good traits takes a lot more breading of a lot of different bees. Plus to get a decent output you need alvearys with frames which can be automated but again takes time and resources. So to get the 'cheaty' bees you need lots of time, infrastructure, resources, and power. Or you could make a random mystcraft age, grab out a quarry which requires only a handful of diamonds, slap some power onto it and boom, resources. Or frickin turtles.
And the Laser drill produces somewhat random ores and could only recently be set to prefer some (emeralds, uranium, some others) And it now produces seemingly anything classified as ore, so you get a bunch of gems and junk (oooh,sapphires, just what I always wanted).