First, i had enough pushback to get me to update the original post. I needed to say “generally doesn’t make CO”. This is based on wood definitely can emit CO when burning “charcoal” e.g. wood without enough O2 or fresh wood.
Regarding my rationale, I thought it had to do with the spacing or timing of the burn through each grain/fibre. Wood contains water/sap and would therefore have catalysts or contaminants that would change CO into something that would be easier to detect and remove (e.g. irritating ash) than any of the fossil fuels.
Thanks for the correction. I updated my post.