The article you quote mostly concludes that it was probably a correct assertion. While the Moses parkways were certainly based on older ones they were found to also have substantially lower bridge clearances than the ones they imitated.
To be honest, what I find more confusing is that nearly a century later we still cling to the parkways being for no commercial traffic. It wouldn’t be all that radical to, whenever a bridge is up for replacement, replace it with a bridge that does meet Interstate clearance standards, and it would provide a less chokepointy system for trucks and take them off local roads, where they have a worse impact. The days of the bucolic parkway have long passed and they are all heavy commuter routes now.
To be honest, what I find more confusing is that nearly a century later we still cling to the parkways being for no commercial traffic. It wouldn’t be all that radical to, whenever a bridge is up for replacement, replace it with a bridge that does meet Interstate clearance standards, and it would provide a less chokepointy system for trucks and take them off local roads, where they have a worse impact. The days of the bucolic parkway have long passed and they are all heavy commuter routes now.