Sure it does.
The guy who didn't charge the absolute top dollar "then and there", because he knew that he'd pay dearly for it later on, was indeed taking human nature into account, and maximizing his profit.
Maximizing long term profit is not anathema to property rights or capitalism.
By the same token, I rather suspect that his suppliers (commodities such as fuel, food, etc.) are charging him what the market will bear, and not being "mister nice guys" for his benefit.
Different strokes for different folks. Different markets take different marketting.
Local merchant doing local business on a long term basis, yeah, he's gonna have to market differently than a petroleum processor or a drug manufacturer.
But ultimately, the merchant that doesn't do what's in his own long-term best interest is not going to be around to have a "long-term" as a merchant, because someone else will come into his territory and cut him off at the knees.
This article is not about long term profit. It's about taking advantage of a desperate situation and gouging.
Capitalism in its purest form, like socialism in its purest form, do not take into account human nature.
I am talking about the theory and those who want to see it practiced as gospel. It's simply about numbers and does not include human nature in any of its calculations.