One of the core differences between investing and gambling is diversification; and EA (like most western publishers) has done a very poor job diversifying their investments. While it would be difficult to achieve the ideal, a well balanced portfolio of games should result in a line-up where every platform represented a small portion of the total publisher’s sales; and every genre represented a small portion of the total sales on each platform.
When the bulk of your resources are allocated to a small set of genres where most of the games will be released to a small number of platforms you're setting yourself up for a fall when you make a mistake.