I can't speak for how highly the engineering profession is regarded in the US compared to other countries because I haven't actually experienced the differences, if any; and I would guess that not many commenters here have, either. In any case, I have never been given cause to think of myself as being considered less of a professional than anyone else.
Granted, engineers here do not enjoy the higher salaries of dentists or medical doctors, who have highly restrictive medical school entry exams and formalized schemes for extended training requirements, all of which limit the number of graduates so as to assure high salaries more than anything else. That seems to be the real professional advantage that doctors and dentists have --- restrictive entry exams, which reduce the supply of doctors and dentists, which increases their income, which in turn engenders a form of respect.
Now consider, for example that a dentist’s work consists almost entirely of being a cross between a mechanic and a small parts grinder. A surgeon, regarded by many as next to godliness, is little more than an eyeball mechanic and a sloppy tailor who relies on nature to clean up the rough edges of his work. Internists can order dozens of lab tests and order expensive pills after problems get serious, but they usually can’t prevent much of anything. The medical profession thrives on heroics, not prevention.
Suppose we severely restricted the number of engineers, so that all we had time to do was firedrills to patch problems; and we set ourselves up like doctors – avoiding the design and preventive phases --- and make our services available only after something goes wrong – the bridge breaks, or the airplane crashes -- would we get more respect? Read carefully – the answer is, unbelievably, yes(!), at least in this hypothetical framework. Is it ethical? Of course not; but remember how the highly respected medical profession works. Is that ethical then?
So why are we less respected for busting our buns to design and provide good things for the world? Once again, I can only conclude that it all comes down to exclusivity, an air of superiority, and money. So I will concentrate on these within the context of the original question about licensing.
Today’s practice of licensing engineers does not accomplish anything to make engineers superior, because almost nobody is denied a license after they’ve already spent an exorbitant amount on college tuition. In other words, the tests are largely a formality. Sure, they weed out a few, but darned few.
Today’s practice of licensing engineers does nothing to make the profession more exclusive because, as mentioned above, licenses come after the degree and do nothing to limit the input of engineering students. Meanwhile, the engineering colleges do all they can to increase the number of students, including the lowering of their standards, despite ABET.
Today’s practice of licensing engineers does not cover all types of engineering. Until all practicing engineers of all types are required by law to undergo a medical doctor-like entry exam and training process in order to be certified to practice in the state, companies will keep flagging down people off the highway and call them engineers.
So, if the logic is to improve the profession and/or its image by licensing, then the license needs to be made mandatory by the laws of every state; and the exam must be moved to the front of the engineering education process. The exam has to come first, and it has to be hard enough to eliminate at least half of the applicants. Otherwise, it fails to accomplish the goals.
It is difficult to see how such a thing could be implemented. Opposition would be fierce. The engineering schools would fight it, because they would lose most of their students. Half of them would probably close. Companies would fight it because they would have to pay more for engineers. Or would they just outsource to countries where the supposedly more highly respected engineers earn a fraction of the salaries in the USA and queue up at the US embassies for the chance to relocate here?
It gets to be a complicated thing to change.
Your turn.....