I am looking for a word or phrase to capture the notion that too much diversity can backfire. Here's the context. In some technical fields (such as programming), there may be hundreds of possible ways to solve a particular problem. In such cases, it may be better for a community use a small set of common patterns. (In spoken and computer languages, these patterns are often called idioms.)
An example sentence is: "If we drive adoption of Standard X, we can prevent incompatibilities that would likely arise from uncoordinated solutions." The underlying logic goes like this: the benefits of standardization and coordination outweigh the "freedom" or "diversity" to express a solution in hundreds of ways.
To clarify, I'm not talking about artistic expression or freedom of speech; I'm talking about technical standards like HTML. As the argument goes, it is better to have a (more-or-less) standardized version of HTML so that tools can be built on top. (It is better to have almost everyone agree on the standard so we can all communicate using a common format.)