I don't think the article argues for superior solutions, but I understand how it can feel as such.

I think it's just trying to say there's another dimension, the meta-level enabled by macros and Lisp's syntax that opens up the possibility of new solutions, which may or may not be better, as that's so context dependent.

But what I feel it's saying is you can't even begin to imagine solutions that leverage this new dimension without learning about it and getting to grip with it mentally.

In that sense, it's saying when you don't know, you can't even explore the space of solutions at that higher dimension, not necessarily that they're better for all problems.