Any such profession is a category of bullshit job in the book, whether or not you personally think corporate lawyers produce value to the world.
So the job isn't bullshit as long as those laws exist.
The whole idea of "bullshit jobs" seems to focus on the job, not the environment that produces them.
That would apply to any profession which involves competing in a zero sum game.
Zero-sum games exist, therefore these professions exist to enable players to win them
I could never work in a zero-sum environment.