Not sure the way “holistic” is being used here is really appropriate. Holistic doesn’t mean “writes about every other state or country.” It means covering the full picture of whatever area you’re reporting on, and I’d argue Tucker did that better than most.
He covered Queensland rugby in genuine depth: schools, clubs, pathways, Reds, politics, history, player movement; that’s a holistic view of the code in this state, his target market. Spreading yourself thin across multiple regions isn’t automatically more “complete,” it’s just broader. Tucker went deep, and depth of his knowledge in Queensland is what make/made him good writer.