lots of great ones that study their field and provide knowledge, expertise, etc and are looking out for the the best interest of their customers. These sales people make a lot of money not because the conned people but because they get repeat business and referrals.

This is such a crazy line "I think almost all sales processes engage in some form of deception in order to close the sale" If you are referring to door to door salesmen like Pest Control, Kirby Vacuums, timeshares, or MLMs we are on the same page. But there are lots of great sales people in many industries.