The J1772 pins simply are not rated for the high currents on the DC pins. Tesla designed their connector for high current DC from the start. J1772 didn't.
Ed is good at mixing up the details. He likes odd arrangements, oblivious that there are huge amounts of inertia in any standard. No charger company is going to want to change connectors now. Likewise, what car company wants to obsolete their previously sold cars... well, maybe that's not valid. ;)
I don't know much about the CCS protocol. I do know the J1772 standard is very, very simple and doesn't necessitate digital electronics in the EVSE, even if they all have an MCU.