A diversity of personality types doesn't guarantee better code either. I'm suggesting that there's a tradeoff to be had with the various aspects of open source that require time and energy. Spending an increased amount of time and energy on supporting a personality-diverse community (and less on other things, such as writing code) should not be assumed to automatically equate to better code.

There is a very real possibility that angry language results in an increased ability to ship code by discouraging more net-negative contributions than net-positive ones.