You’re probably about my age, then, and I’m old. It might not be the baseline CO2 levels. :-)
Kidding aside, that would be hard thing to baseline.
Also, when you cook on a gas stove, it produces numerous other toxic gases which too are critical to ventilate before they even escalate, failing which the lung cancer is risked.
Scrubbing indoor CO2 is sensible only when you want to go below the outdoor CO2 level, not at levels above it.