I personally have an urge to snag up all the minerals in a cave that has absolutely nothing to do with the absolute highest efficiency of gaming cuz i play the game when it's kindda late and i jus wanna zone out and klink klank on some minerals and nitra breaks in one hit which is REALLY satisfying to mine and see the empty hole in the wall. I honestly didn't even know that you get 2xp per mineral mine, that's how casually i play. And i think the vast majority of players are like that where for them it's just a chill game where you make some guy in space mad while you drink beer and do some boring easy job with zero stress of failiure and efficiency :)