I don't think this was a case of all brawn and no brains.  And I think it was more then simply not carrying enough water.  I think this is a case of a person looking for a survival situation.  He was looking for a challenge, and he was possibly depressed.  He was a driven man who had lost a title fight and a come back fight.  He also sounds from the article like someone too proud to ask for help.  Its a sad story of a person who had many of the traits need to survive (unwilling to give up) but still lost the mental battle for survival.
"Pride only hurts it never helps." -Winston Marseilles, Pulp Fiction 
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A gentleman should always be able to break his fast in the manner of a gentleman where so ever he may find himself.--Good Omens