Human weighting of incentive signals differs. "We should not go against slavery, it's an $X billions industry" isn't precisely how the US South thought about the problem, but ultimately they did go to war because they recognized that chnage in the status quo would bring utter economic ruin to a powerful sector of the populace with the political and social clout to goad the rest into war.

So yeah, "That industry makes an awful lot of cash" is useful to factor into one's thought process when one tries to reason through how one could tear it down. If nothing else, it's a first-approximation barometer of how much people will spend to oppose your efforts.