I frankly think you're giving him far more credit than is due with this assessment. You characterize the things he did after the fire - namely his sheltering in-place with his remaining resources - as a choice he made, and that he could have chosen to do something different instead, and the fact that he did not was the result of a competent risk assessment on his part.
I can't really agree with that. He didn't merely have "inadequate" trail gear, he had absolutely no trail gear. He had boots but no socks. He had a set of scavenged overalls, but no coat. His food was all cans and jars - heavy and impractical to carry at any rate, but a moot issue since he had no backpack. "Walking out" wasn't an option that he carefully considered and thoughtfully decided against, it was impossible.
In fact there was no "option"; there was nothing left to do at all in the wake of the disaster except stay as close to the stove as possible and eat the remaining food until it ran out, and that's what he did until Lady Luck sent a rescue helicopter his way.