Not true
I am proud to be a salesman. FYI, we don't choose our titles, management does. What's more rediculous is the title in lieu of compensation. At one point I had the title of "National Strategic Account Consultant." Which did provide for a few laughs, so at least it was an Ice Breaker. My card for the last 10 years had no title on it.
Also, I vividly recall a couple of our best salesmen wanted the title of salesman on their card and they weren't allowed to get them printed that way.
Finally, sales people (me included) are very proud of what they do. If it weren't for sales people, no one else would have jobs. So you might want to go thank your sales department.