I could have bogged the essay down with qualifiers to address all the potential straw man objections, but that didn't seem productive. It's easy to take an uncharitable view on this, but I do explain more about GRNs later in the essay. I worked with them for 8 years, and yes, they do act like the rudimentary brains of the cell, and that's the reason this system is selected again and again by evolution.