Poorly defined nomenclature. Simple as that. I’m an “automation engineer”, have had many other titles (...)
Anyone can call themselves what they feel like it. However, in some jurisdictions and contexts the title "engineer" does have a specific meaning, consisting of someone who not only has the necessary and sufficient training but also is a member of a specific professional body. These credentials have meaning and those who try to pass themselves off as one without having the certification or credentials might be breaking laws.