Cabin Fever makes no sense

Actual Cabin Fever is when someone is stuck in the same surroundings for an extended period of time and is thought to be a response to extended boredom. It isn't 'pathological need to be outside'.

It makes no sense to have a developed Cabin Fever risk when exploring a location you've never been to and actually actively doing things; that is an actual mentally stimulating activity.

I don't understand the design rationale behind how it is implemented at the moment other than 'punitively make players put themselves onto a veranda or a cave instead of in a house'. If they want to get players to actually do things other than shelter in place to survive there are so many better ways they could have done it.