You guys have to understand the idea first.
In 2006 the Cleveland Indians were 78-84 and scored 870 runs and let up 782. They scored significantly more than they let up. The following season they didn't change much of their team, a few new players like every season but nothing too major. They ended up going 96-66 while scoring only 811 runs and allowing 704.
2006 Pythagorean record - 89-73.
2006 Actual record - 78-84
2007 Pythagorean record - 91-71
2007 Actual record 96-66
The whole point is that teams usually don't lose every single close game. The luck factor which does come into play in sports a lot more than many of you give it credit for usually is pretty balanced. When you get such a lopsided record of 5-9 and have still scored 30 more points than you've given up, some of the record could be contributed to luck.
I'm not saying we are some great team that has gotten unlucky every week and we don't have to worry about changing anything. My point though is that teams who score more than they allow usually win more games, in any sport. It also isn't as if we came up with this to "spin" anything. Bill James, the most respected statistician in sports uses expected W/L and values it greatly.