We aren't even talking about structural engineering here. We are talking about an electrical engineer submitting comments regarding traffic.
The only reason these are related is the word "engineer", which is ambiguous.
The contents of this man's letter are not physically acting upon traffic. They were submitted to be considered by a group of "licensed" traffic engineers.
The subject does not require the decade of specific education that is required by a medical doctor, or even months of training that is required by an EMT.
It's about a traffic light camera, which an electrical engineer would be able to understand significantly better than a layman, making the fact that he is an electrical engineer important to the subject.
The state fined him for his claim of being an engineer, defining the word by its context (traffic lights) instead of by its adjective (electrical).
The state abused this notion to delegitimize his words, and to disincentivize him commenting in the first place.