Your mistake is assuming that those selfish reasons are all about profit. Other motivations may include things like having a vision of themselves or their company as actually caring for the customers they serve, refusing to compromise their products/services because they themselves (along with others they care about) are also users of them, or even purely ideological reasons (actually having some integrity). Exactly how selfish those kinds of motivations are is open to debate, but there's no need to get into philosophical arguments about whether or not mankind is capable of altruism because either way, money still isn't the motivation or goal behind it.

I promise you, there really are companies that put their users before maximizing profits. There genuinely are people who aren't obsessed with money over all else.