If the framework were even a tiny bit useful, wouldn’t it have made you at least an okay salesman?
Conversely, wouldn’t the great salesmen be great regardless of how valid a framework is?
Also, the ‘personality’ piece is a small (but important) part of the larger framework that is car sales. We literally had a physical ‘playbook’ to follow. A very well defined ‘road’ to walk the customer down, and if you skipped any of the steps, it would jeopardize the whole process. Sales really is a solved puzzle, every step & technique is there for a reason, because it is proven to close people down.
So no, a great salesperson won’t be great regardless, they will be great because they follow the rules of sales. Natural charisma & like-ability go a long way, but I saw numerous guys who were terrible when they started, work hard at the system and perfect the process, end up selling 20 cars a month.