money.
Rich teams from big markets do better than do poor teams from small markets. They buy teams.
Every St Louis, Cincinnati, Detroit, Pittsburg, Kansas City, etc. win in either League or World series over the years took a lot more long-term attention to detail, dollars, determination, and deftness than all the big-market wins put together.
The balance of pro football proves that.
Football has a salary cap and a huge TV contract which subsidizes the teams.
Baseball today is all about scouting and building with smart players.
I think I'll shed a tear for the little guy. Wait, no I won't.