Because asteroids with fissures can be so extremely far-and-in-between, as mentioned earlier. It can literally take me an hour to find a single one, and that's checking yellow-highlighted asteroids as fast as I can, meaning literally hundreds of them. If I stopped to laser-mine and extract the surface and subsurface deposits of each one, it could take 10 hours to find a single asteroid with fissures.
And the reason why I want to only core-mine is that it appears to be so much more lucrative. Like twice or even triple the merits per hour, even when it takes a long time to find those core-mineable asteroids.
I’m not saying stop and strip mine each asteroid you encounter. I’m saying that while searching for the yellow asteroids, you shoot some of them with a prospector limpet, to see if they’re worth laser mining. For example, only strip asteroids with 30% of one of the three P’s.
It could very well be that you’re so focused on playing the lottery of core mining, that you’re ignoring all the potential sources of wealth around you. That’s the impression I’m getting from your previous posts. But then again, I’ve never bothered mining much.
But from posts I’ve been reading, it’s laser mining, not core mining, that’s at the heart of others mining success. Just like for me, it’s the missions, not “rescues,” that are my primary source of merits. The latter has a much higher
theoretical earning potential, but in practice it’s so variable that I’m treating them as a parallel activity, one done alongside the more reliable activity, rather than the main one.
At least you got me curious. I really should take the time to see how well I do with mining… assuming there’s a strategically valuable system. Which is why I’ve ignored it up until now.