O2 Sensor on a Carb Engine Question

Yeah yeah, I've heard that before;
I think you completely missed the point,
We had nearly a hundred years of carbs and never an AFR to tune them, the guy doing the tuning was the AFR man.
Besides
The statement you are concerned about was the lead-in to the fat-lady joke.
If I have to explain everything, there are not enough hours in the day.