``IF THE JOB DOES NOT CONSIST MOSTLY OF DOING MATH AND REQUIRE THE WORKER TO BE LICENSED BY THE STATE, IT IS WRONG TO TITLE IT "ENGINEER!"''
You forgot the people who actually drive trains. An old friend of mine is that kind of engineer.
The argument over who should be called an "engineer" has been going on since the '70s. At least. It's only gotten worse over those 40+ years. Lately, it seems to be the job-title-enhancer of choice by employers who aren't willing to offer a higher salary. "Maybe they'll like a fancier title... We'll call them an engineer."