I always get a kick out of the "finding gold" comments when we ignore gold in the game. I know it's a saying, but it's still funny.But core mining is fun. I really enjoy the mechanics of core mining, it pays super well, but requires you to do the work, and the down time between core rocks, makes finding a valuable core even more rewarding. Plus you then have to survive the trip to sell the ores at the best station.
Nerfing it would make it significantly less fun, because the finding a core wouldn't feel like striking gold, and without that, the down time between cores would feel worse.
Buffing other activities would be good though. Some activities, like combat, pay peanuts, and don't scale beyond medium ships, despite the risks being significantly higher than mining.