Well, yes, but your example is a sub-type of my "more profitable" claim. The companies want the definitions to be clear because otherwise there is a large uncertainty cost which will affect profits. They don't care about destroying value as long as it's not their value.

I agree that companies often lobby for regulations which decrease their risk -- but typically what they want is to ossify the existing structures and put up barriers to newcomers and outside innovation. If you are large and powerful enough to influence regulations, you want to preserve your position as large and powerful. Generally speaking, that's not a good thing.