Fine, fine, I'll post the screed. My point is that the word "professional" is now all but synonymous with "slick salesman"
Personally, I doubt that "professionals" were any more trustworthy before I was old enough to notice, too... thus me poking fun at the very ideas underpinning it.
(as an aside, I don't know all that much about finance... but as far as I can tell, it's nothing but sales, so there really isn't any room for professionalism in the way you mean the word. They aren't doing anything but selling.)
My experience with people that claim to be 'professional' or who attempt to dress professionally - nearly all of those people I know are salespeople. If you want someone to show up on time and look good? sure, go with one of them. If you want the correct answers to your questions? if you want someone to give you truthful answers even when those truthful answers mean you go with a competitor? find someone who is actually into what you are trying to do.
That's the thing, at least in the part of Engineering where I work? sure, some good Engineers claim to be professionals, but almost none of them put any effort into the appearances of professionalism. Few put any effort into dressing or grooming, and many are habitually late.
The only people I know that put a lot of effort into appearing professional are the sales people.
I mean, sure, you and I can argue back and forth all day... "Words have meaning!" and, of course, a 'professional' is someone that does a job that requires a lot of training, and probably comes from an upper middle class background. But the thing is, that meaning changes over time, as how the word is used. Personally, I associate the word 'professional' along with the western style business suit, with fraud, mostly because the Engineers I know don't put much effort into claiming to be professional, while most sales people do. I think that more and more people have that opinion of the suit; even salespeople I meet rarely wear suits, (though, of course, they still loudly declare they are 'professionals' even though they have little knowledge of the product and are more than happy to make up ridiculous lies about their own product and the competition.)