In my home country of Austria it's easy to distinguish a federally licensed engineer without forbidding the use of that word for people who are not licensed.
A licensed engineer may put the title "Ing." in front of his name (e.g. "Mr. John Doe" becomes "Mr. Ing. John Doe") in communication, everyone else can still call themselves an engineer without issue but are not allowed to use that specific issued title in front of their name.
A similar solution could have been found here, where people who are licensed can use a suffix like "CE" with their name.
Federal licensing does not mean that the dudes in question know what they are talking about. Titles and papers are, at the end, only titles and papers. If you live long enough you meet enough clowns with PhDs.
There are liability questions attached to formal qualification.
A company that sends out unlicensed / untrained staff to fix something will have a harder time convincing a judge that they did their due diligence if something goes wrong.
I am not saying this is good or bad, just that it is legal reality in parts of Europe.
Something similar is brought up in the decision —- the licensing board could have had the licensed engineer's stamp their reports as a way of marking them as produced by licensed engineers.
That the board just tried to shut Nutt up instead is one of the reasons they lost.
A licensed engineer may put the title "Ing." in front of his name (e.g. "Mr. John Doe" becomes "Mr. Ing. John Doe") in communication, everyone else can still call themselves an engineer without issue but are not allowed to use that specific issued title in front of their name.
A similar solution could have been found here, where people who are licensed can use a suffix like "CE" with their name.