Bob's comments are interesting, in that they define him as a self deluding snob. There are very few people who work without self-interest. Also just because one has codes of conduct and is self-regulating means nothing. Often it is only through external regulation that a group is held to the highest standards. Self-regulation is often a smokescreen for cover-ups and back patting. I would also say that 'trades' have become, in all of his rather random definitions, much more professional. Bob is just a snob.

Yes, as an engineer I am disappointed that nobody realizes that they put their lives in the hands of engineers every day. I guess when you do something right nobody knows whether you did any thing at all. The next time your car stays on the road or plane stays in the sky don't go thanking a Farmer. When a building or bridge doesn't collapse on you don't give the accountant the credit. When you get home and all your appliances haven't all spontaneously caught fire and your microwave and iPhone don't blow up in your face don't thank the plumber. PS: Medical devices and pharmaceuticals also don't grow on trees. They need technology and we now all know where that comes from by now don't we? And no it's not from scientists. Think engin....s.