I've passed the Fundamentals of Engineering exam for EE. There was a civil engineering portion, and I passed it despite never having done any schoolwork in civ-e. It's not hard.
Sure, but I'm not sure why that applies to the many other Es (ChemE, MaterialE, MechE, ...), or why it would just focus on what is done with respect to civ-E (given the other Es, just because it was second oldest?), or do they include other Es as well?
The CivE questions are not much of a departure from Mech-E at all.
That still leaves chemical engineers and material engineers, and that is partly because Civ-E is older, and the need for licensing in Civ-E was established first, by the Quebec bridge disaster.
But ultimately the whole thing is an exercise in social engineering, to make you care about your honor as much as about money (the money for being a PE is not that big a bonus), and making you look at Civ-E for a day in this fashion, well, it works.