Not sure what you’re reading, but it said nothing about requiring a license - what the person said was very different than the definition cited. In fact, the obsession over the license part clearly misses the mark.

This is what the summary mentions as the only supporting evidence of any sort of credentialing:

“The foundational qualifications of an engineer typically include a 4-year bachelor's degree in an engineering discipline, or in some jurisdictions, a master's degree in an engineering discipline plus 4–6 years of peer-reviewed professional practice (culminating in a project report or thesis) and passage of engineering board examinations.”

Note that the word used is “typically” - this is very different than being a requirement. The definition of a professional engineer cited mentions no such credentialing required, speaking in broad terms of the characteristics & responsibilities of one, but no narrow hallmark of how one reaches the title.

The part he quoted is far from verifying his/her claim - just the opposite, it is evidence that he/she is misusing the term professional engineer and is not distinguishing from a licensed professional engineer from a professional engineer.