In the past 5 - 6 years the views on HN has generally shifted that making any amount of profits would be viewed as evil.
But there are many, many, many examples where the harm is very clear. This is one of those cases. The only reason 53% (supposedly) of the Dutch population support the farmers is because they don't know the full story.
If I come into your neighborhood and do something which gives me a big profit but screws you and your neighbors, should my profit-seeking be commended? Or should we evaluate the real cost?
I'm happy to pay farmers for their work, so long as their work doesn't add pollution beyond what is legal to the environment.