Earlier quoted context omitted.
> Noone parts with money for an exchange that they don't find useful. I think this is true at face value, but when we consider addiction and self-destructive behaviors it is clear that while the definition of useful my still apply, the result is a negative impact on society. The easiest most inflammatory example is drugs, but a more nuanced example might be slot machines. I won't wax lyrical about the examples, but I…
> drugs ... slot machines i would assert that drugs or slot machines both provide value - they are entertainment, and the people using them are deriving value out of it. Why is that those people's enjoyment doesn't factor into society as being positive? Are they somehow not part of society? If you imply that because they must've committed a crime to obtain the money to pay for their entertainment, then it's not the e…
The tautology is that what people exchange for has value, but it has value because people pay for it. Specifically that it has the value people are paying or more.
This is a sort of free market idea: why would someone swap for something that isn't good for them? People must be swapping for stuff they want. To a degree this is totally reasonable. Why does a guy buy a razor if he doesn't think shaving is worth it?
The problem with this kind of thinking is it can never check itself. There's no independent way to give an item a value, so how do you know the exchanged values are correct? There's an assumption implicit that the market gives everything the right value, but it's not checkable without some other way to come up with a value.
And there are reasons to think this value might be wrong. For instance externalities, but also plain old "consumer misjudged the value".
I met a guy who exploited every trick in the book when building his business. He always picked addictive stuff. Online casinos, vapes. He would also put in fine print that people were buying a minimum subscription, so they would they surprised when they got billed a second time. On top of that he found a way to trick Facebook into showing his advertisements that were against the ToS. I doubt anyone got what they thought from this fellow, but he's rich now.
This isn't to say everyone who sets out to just make money makes a mess, far from it. I'm sure there are people whose get rich quick scheme is genuinely useful to other people. But it does mean we need to keep eye on behaviour to make sure there aren't abuses.