Reading his piece, my impression was that this guy can formulate his ideas fairly well, but his writing is horribly stretched and, at times, outright boring and bland. IDK if this can be fixed with enough practice. Maybe. Maybe he just does not have enough "internal energy" (for the lack of a better term) to spout some engaging prose spontaneously.
That could have been fine in the 19th century, when long and low energy novels were the norm, but contemporary standards and expectations are very different.
Accidentally, I feel that my writing flows better if I have something else to do, too. Maybe being retired just does not help you get things done.