Note that you&#x27;ve made the leap from &quot;may be&quot; to &quot;must be&quot;.<p>There are numerous highly persistent behaviors, including play, entertainment, sleep, drugs consumption, recreational physical activity <i>in excess of all training response stimulus requirements</i>, etc., which nonetheless continue.<p>While I&#x27;m not certain that <i>all</i> are beneficial, and I have a difficult time myself accepting certain of these, I suspect they play a useful and possibly even vital psychological role for those undertaking them.<p>Even explaining these as coping mechanisms for underlying pathologies isn&#x27;t particularly satisfying.