This is incorrect advice. It's fine to power via the header power pins (these are NOT gpio pins as the author claims, but are instead power pins on the pin head

This is incorrect advice. It's fine to power via the header power pins (these are NOT gpio pins as the author claims, but are instead power pins on the pin header). The transient suppressor the author mentions isn't as valuable when you are hard wired via the header power pins, the TVS is necessary when you are plugging and unplugging the usb cables and there could be significant voltage differences in the cable vs. your PI that could cause damage. If you are direct connected and not plugging / unplugging there isn't an issue if the TVS components are bypassed because there aren't transients like that occurring.