Going back to the original scenario...

"... could having a short-mid term BoB actually prevent one from adapting to the new environment?

Would you be able to repair a roof without a hammer? How long would it take you to reshingle with a rock? How long would it take you to make a serviceable hammer? And while you were doing this job, what would you be doing about water, signaling, and food? Having a tool for likely jobs is a plus, not a minus.

"While sitting around the campfire (started with your keychain firesteel) you start showing off the skills you have learned.
Who is going to have more to show?"

The one who didn't have to reinvent the wheel under stressful survival conditions.

"... the adrenaline is simply not going to be there."

Adrenaline is short-term. It's to get you from an immediately-dangerous situation to a less-dangerous situation where you can start thinking instead of reacting. Constant adrenaline is exhausting. Why would this be valuable?

Sue