Cooking in a Tent or Not - a Real Life Situation

https://outdoorsfaqs.com/why-is-it-not-advisable-to-use-a-butane-stove-inside-a-tent/
When you cook in a tent and use the usual gas canisters, there may be CO produced in the process. But CO is more or less the same weight as the rest of the air, therefore with ventilation it will go away. This is why it is advisable to keep the tent ventilated when you cook inside.

The point is that in many situations cooking in a tent is not a matter of choice. You will cook inside if you have to.

Regarding the danger of fire, modern tents will not burn easily, if at all.

All in all, apply a simple logic and measures and you will be fine.