Baring philosophical, religious preferences or other bizarre inhibitions, I don't see the difference in making money from poisons, ores or dung. Wealth is simply wealth.
What does ring true to my ears is that you object to the competition in the pickin's. You're a picker but I can relate as I have serious competition myself. My typically simple minded approach is to strive to be there
first and often. I hear that tactic works rather well for non-pacifists in your profession as well.
Written by my hand on the 16th of Cloudburst, in the year 1152.