I disagree with this article's perspective, but I understand what the author intended to say and to a certain extent I like how the idea is presented.

Yes, Lisp's power comes from the embodiment of code and data together in one manner, and the ability to treat them this way when writing code is good, but `read` is a coincidence of that power, not a demonstration of how it is used. Macros are the method by which we harness the power of homoiconicity in an efficient, powerful manner.