Free speech. First Amendment covers source code and similar expressions. Regulating free speech is virtually impossible. That is where the whole project stops.
That doesn't mean that lawyers can't make jokes and architects can't draft blueprints for buildings that smoosh every occupant; it means their professional statements have legal weight.
(I like to think of this as pretty similar to the Haskell IO monad. At some point you have to break out of your cozy side-effect free code and actually do something. At that point you have to deal with the messy real world.)
HIPAA would be a much better example of regulation that is material w/ respect to software development.
And Haskell is excellent for dealing with the aforementioned messy real world. Better than any of the previous languages (for 1000+ loc) I've worked with.