[Grustaf]

The post didn't say that it made sense _relative_ to something else, it just said running a school in the proper way didn't make economic sense, and that is not true (except in the sense pointed out in another comment, that honest schools may be outcompeted).

My point is just that a project's economic viability doesn't depend on the relative merits of other projects.

[jacobion]

> a project's economic viability doesn't depend on the relative merits of other projects.

I'm not sure this is true - certainly the opposite of this statement is the central thesis of most investment activity.

[Grustaf]

If you are evaluating the viability of a specific project you don't vare if there are other projects that are even more profitable, you only care if the current one has a positive return on investment.

Of course when choosing between several projects, such as starting a school or launching a scam, then yes you would look at relative profitability (_and_ absolute of course).

Few people will hopefully find themselves choosing between those two options.