Clearly you're shooting from the hip instead of actually looking into what he does. From his website: "Drawing on more than twenty years experience in the automotive industry, including retail sales, dealership management, sales training and management consulting, Tom Stuker has become one of the most dynamic trainers and speakers in the automotive industry. Tom personally has made over 300 appearances on ASTN (Automotive Satellite Training Network), been rated as the #1 Workshop and #1 Speaker at NADA conventions; appeared on ABC and has spoken to dozens of City, State and National Organizations."
This is exactly the sort of business where companies would demand the seminar to be done in-person as opposed to via videoconference. You simply can't replicate the dynamic, break-out sessions, and active participation any other way without people simply tuning out. And clearly he is considered one of the few utmost experts on this subject and thus someone more "local" can't be a substitute for him; also, companies are risk-averse, so once a training methodology has proven to be successful for competitors, unless there is evidence to the contrary, no other company is going to take the risk of attempting an unproven method. You are incorrect if you think a lot of people can be successful at what he does - it's like TV
show hosts - there's a reason you only have a small handful (Ryan Seacrest, Tom Bergeron) who have the knack to do what on its face may seem like a simple job, because so much of it is personality and ability to adapt to the particular audience being addressed.