I don't understand why people think it is so important a thesis to convince people that a person sells something to get as much profit for his product. Much as

I don't understand why people think it is so important a thesis to convince people that a person sells something to get as much profit for his product. Much as it is important to educate people of loss leaders, subscription models, brand marketing, and other newer ways profit maximization happens, they aren't really cutting edge concepts either. I make a decent living now, and I use Harry's razors. Could I use and change the cheaper disposable ones more often? Sure. Is Harry's quality worth paying for so that I nick my face less? Very much so. I don't really need to be told they're "out to get me". I'm a big boy who can do simple price math.