Can you elaborate on the minimum legal requirement that you mentioned?
One penalty involved is personal criminal liability for executives - for certain executive roles, if they unknowingly make a serious mistake, they face a $1 million dollar fine and up to 10 years in prison, and if they knowingly make a serious mistake, it's $5 million and 20 years. [2]
Hence, executives have a strong motivation to ensure nothing is misrepresented, left out, or wrong in their investor relations documents.