The point of the author seems that autopilot is better than FSD for him:

Without FSD, you pay attention to the road and everything else is within your control. With FSD, you still need to pay attention but now there’s the additional cognitive load to monitor an unpredictable system over which you don’t have direct control. Forget about just being focused, you need to be hyper-focused, and you need to pay $99 per month or a one time fee of $12,000 for the privilege. With the limited functionality of autopilot, you hit the sweet spot: adaptive cruise control and lane centering work reliably, and you don’t need to worry about any other mischief.