Because the Contractors Nationwide are going to see it only from their perspective. They'll all think they're way is the ultimate answer.
The paperwork, discussions, court cases, etc. would provide enough red tape to tie up the process for at least 100 years.

I see all the previous answers are from back East, with the exception of Reno.
There is not even a Master's classification in California, the classification just doesn't exist.

Then there's the issue that Don brought up about State's rights.

Are you willing to admit that your way isn't the best way?

Better to let sleeping dogs lie.