There is no part of the OC that suggests a positive or negative moral or ethical assessment of the behaviors they described.
That is an easier argument to attack than what was actually described (a series of cause and effect), projected onto the scenario provided in the OC.
Acknowledging the motivations and logic of others, even those you disagree with, is not an endorsement of them. It is a fact that what OC described is how the history of capitalism played out in practice (with a large spoonful of corrupt lobbying to drive those wages down and profits for capital holders up).
I hope that clears things up. You weren't "just asking a question". You were presuming a specific answer and asking them to verify your presumption. If you were genuinely asking a question about how it was read, you could have easily said "I read the OC to imply that workers should be exploited. Is that the fact you're referring to? I ask because that seems too callous to be true."