I am going to attempt to answer this question:
"But why are name magicians, people whom I respect and envy, all agog over the sales pitch styles of selling a trick deck?"
The thought process may not be the 'deck' in general. It may be the thrill of the chase. The sale. The ability to make mounds of people say "YES" to something we have to offer. Now take the 'deck' out of the equation and put a magician in its place.
If a magician can take something from the Svengali Pitch that they could interpret into selling themselves...then they could get more people to say "YES" to hiring them for a show. Just because they want to see and learn the Pitch does not mean they want to suddenly become pitchmen. It can easily be used as a lesson to sell yourself. Like many sales courses available, you take away what fits you best and develop that into a style or personality that helps helps sell you.
It could be that people who you respect and envy aren't all agog over the sales pitch styles of selling a trick deck...instead, simply looking for ways and ideas of selling themselves.
Just another way of looking at it...outside the box. www.JeffEzellMagic.com