I agree with rather having alternatives to mining with profits vs risk ratio balanced across the board for different activities. I actually already dislike the planet mining and generally - automatic cash grind. If players want credits, they should move their butts to earn it, the earning itself should just avoid being tedious as much as possible.
The general sentiment I cannot agree with. "Let the robots grind I want to fight". It's a straight way to "It should be fair for every type of player - let the robots grind, I want to mine", then "Let the robots build, I want to see my empire grow" and at that point it's "Let the robots play the game for me, I just want to see noobs pwned". And when the game plays itself for you, it's when StarMade dies as I doubt it would stand against the competition offering more and more things player both can and has to do in a varied gameplay.
Funnily enough, I've noticed such thing with a few MMOs where some, while offering automatic boons expanding with no effort in-game power of the current playerbase to keep them hooked, often get completely ignored by potential new players who see that without devoting their whole free time there is no chance to catch up.
It may not be exactly the same in StarMade, where there is great division with different servers and fluctuating userbase, but it will make the balance of power quite twisted as player factions will have even easier time to secure great amounts of resources/cash, while struggling players will struggle even more.
Lastly, the game currently, outside of building suffers from very short and bland progression. There's still little to see and few chances for original adventures to be had without players organizing themselves to provide such (it will probably change with some more background fluff, developed factions, quests, objects one will find in space and on planets - but so far lot of stuff is not even barebones yet). Offering automatic cash generators seems like a great idea to threaten the few reasons and limiters put on progression that are there (and they do a job bad enough that we don't really need to upset them more).