> They are intensely curious to read the source code of the programs that they use every day.

I can't remember ever wanting that.

> Proprietary software rejects their thirst for knowledge: it says, “The knowledge you want is a secret—learning is forbidden!”

I can't ever remember thinking that.

> How do natural-born programmers learn to be good programmers? They need to read and understand real programs that people really use.

Real program != well written program.

This article makes so many statements in the form of "You must do X because of Y otherwise you are immoral" that if any of those would actually be true 99% of programmers today should not be able to exist by his logic.