I know Ron well, and of course, the intent of the column is to generate discussion that drives magazine sales or website clicks.
The other explanation is akin to hearing a surprising answer from a government official......they are likely retiring and no longer have to answer to constituents, news media, etc. Nothing to lose so they tell the truth. In Ron's case, I am sure he was protecting his access to all gca's for more material for many years, and now really doesn't have to.
Many points are valid. In architecture, copying Beaux Arts or Art Deco eras is considered a low creative period, doing something new is more creative, a la, Frank Lloyd Wright, etc.
I fondly recall not getting a job but acing the interview. I went last, and said all gca's sounded pretty much alike, no? Nods all around. Then I launch into a presentation labeled "Designing for the Past? There is no future in it!" The job had been wired for a local architect who actually played the course, and whose fee as a result was about 20% of what it should have been. He got it, but the committee debated for a few days, and the park director used to seek me out until the day he retired. Moral victory, I guess.
Besides, if form follows function is a thing (and most designers believe it is....) then there is no way 100 year old design principles meet future needs. We face water quality and quantity issues, financial issues, liability issues, etc. not realized then. We need to incorporate those. Granted, the minimalism part of modern design does help address financial and sustainability issues, so there is value in that, and sometimes, old can be new again.