I'm not sure what you're saying. And, yes, I agree, I do have an extreme view. I'm also an extreme outlier.
My view on business is based on my understanding of how for-profit drives inequality. It's a system of unequal exchange. Any system that results divides so great that there is civic unrest is unethical.
Ethics are rules that ensure the greatest good for the greatest number over the longest period of time. There's a reason there is currently a backlash against capitalism.
Being hired to write is, indeed, no unethical. Writing to convince someone to buy something when consumerism is driving climate change is.