all things are a matter of balance.
In this case, you have to bear firmly in mind that the people you are addressing have families to support - threatening their livelihoods means leaving their families homeless and hungry, literally. Since most people would kill to protect their families, certain conflicts would seem obvious.
That said, having worked in and left several different industries, anyone who works in any capitalist industry for more than a few years comes to view that industry with contempt. The longer the servitude, the deeper the contempt.
The loggers who clearcut the forest aren't asked which trees to cut, they're ordered to cut them all by some asshole in an office 1400 miles away; even though they would happily harvest a quarter and let the rest grow, even though their friends have been killed and maimed in the forest and cast aside; but they cut because it is cut or be cast out, and left to starve after four generations of their families have earned a living from the forest.
Your farmers poison their land because four generations of government and corporate propaganda have told them that is the only way to "farm". They can't pay for the expensive land and seed and equipment without corporate bank loans and government bailouts, and guess how those thorns push our tillers of the land? In truth, every one of them hates the poison they spray on the land, and the poisonous crops they grow upon it, and can count on both hands the neighbors dead of odd diseases; but every one of them feels trapped, and trapped alone, to continue upon this poisonous path or lose everything - after four generations of their families have earned a living from the land.
The roughnecks are just in it for the paycheck. Get the money and get the hell out before the bastards kill you (and i can attest that a lot of men die dragging that black poison out of the netherworld, more away from the rigs than on). There is nothing redeemable in this sub-culture.
How does this inform our discussion?
Some people, you just can't reason with. Fortunately, they are also the most tenuously attached to their position - they would just as happily piss off and make a buck somewhere else.
But some people, the ones you are having trouble reconciling with your conscience, are attached vigorously to livelihoods you have a problem with. They have a family tradition of suffering and perserverance dating back further than anarchism in america - to fail in their craft would be an unredeemable shame in the face of their ancestors. Their attachments go deeper than reason. This doesn't forgive the harms they do, but it needs to be understood.
If you could guarantee a livelihood to these people, so they could harvest just enough that the forest and the land would be left to support their children and grandchildren and so on, then they would happily cut less, plow less, dig less.
But we can't.
So we are stuck.