Profit by definition is reasonable. What is unreasonable is plunder. There is a difference. It is the Marxist or communist view that holds that profit is unreasonable if that profit goes to the investor and not to the labor hired to make the product. What is unreasonable is the expectation that an investor not be entitled to a profit. What is unreasonable is when an investor believes plunder is effort. What is unreasonable is when labor justifies their own plunder because they have declared their "masters" plunderers.
Profit, exploit, individual, Captains of industry, Self made man, these are words and phrases that have become synonymous with greed. Labor, class warfare, proletariat, these are words and phrases shoved down a public as if they were sacred words that would elevate humanity towards some higher plane of existence. Every individual, every day, has the opportunity to elevate themselves to a higher plane by their own effort and even by a lack of effort but never by plunder. How can plunder be reasonable is the question.