Sean,
I personally, one is as important as the other. Sort of yin/yang that produces harmony, balance, peace and flower power.
Seriously, I think it's part of competing in any sport, even in business. Striving to win is a natural animal/human instinct
and is the basis of self-preservation. Losing[not wining] drives improvement in sports/business. One of our geneticists here
where i work puts it this way. We as a species, are on the top of the animal kingdom because we adapted to the challenges we faced
for thousands of years. Winning still motivates me most but the challenges of improving myself from not winning can be as important too.
Edwin