Which is exactly why I do have a "real" job.

And I'm not trying to disregard paid software in any way. For bigger tasks, some kind of paid model is often necessary to get the work done.

My points above are mostly from the viewpoint of a solo developer doing small pieces of software (e.g. a couple of weeks worth of work), and trying to make a point that there are some cases where just giving that piece of software away for free makes more sense than trying to sell it.

At least my post doesn't make it become ethical, all my listed reasons are either self-beneficial or neutral. Not single one of them suggests that getting paid for work is somehow evil.