It's because the first sentence of the American Society of Civil Engineers code of ethics is:

Members of The American Society of Civil Engineers conduct themselves with integrity and professionalism, and above all else protect and advance the health, safety, and welfare of the public through the practice of Civil Engineering.

The first tenant of a software engineers code of ethics is:

fuck it, make the boss some money.

Or, formally, according to the ACM:

Contribute to society and human well-being.

Which means fuck-all and includes absolutely zero enforcement like it does for real engineering professions. So do us all a favor and don't whine about our discipline's lack of standards while dipshits who call themselves software engineers are tokenmaxxing a pile of shit and SEO optimizing manipulative user environments for profit.