I didn't get a chance to see the comment before he edited it out, but in some countries (Canada I think?) "engineer" is actually a protected title, requiring licensure.
I don't know what his point was, but as a "software engineer", I sometimes wonder if I should be called a "developer" and let my PE friend keep the "engineer" title, just for clarity's sake.
Canadian here - I'm pretty sure it's only the term "professional engineer" that's protected here, we definitely have tons of people being called "software engineers" who aren't licensed engineers.
In Quebec and Ontario, "engineer" is also protected. Microsoft has been fined in the past because of their usage of "Microsoft Certified Systems Engineer."
I don't know what his point was, but as a "software engineer", I sometimes wonder if I should be called a "developer" and let my PE friend keep the "engineer" title, just for clarity's sake.