Being able to start a fire in all weather conditions is a vital survival skill. It’s one that needs to be practiced regularly.
The point of survival preparations is to do what you can to stack the deck in your favor, come what may. You stock up on food and water in case your normal sources become unavailable. You learn first aid and other medical skills in case someone in your family or group gets sick or injured and you can’t rush them to a clinic or hospital.
Firecraft is similar. You should learn how to build a fire and practice doing so on a regular basis, in all weather conditions, so that if the chips are down and you truly need one to keep warm and stay alive, you can get the job done.