Silver Ram - I get exactly what you are saying. Dealerships know every trick in the book to separate you from your money, many far less than ethical. Not something I would be bragging about on a buyer/owner forum.
The only defence for buyers is to not get sucked into the dealer, take you prisoner methodology. First they grind you in the salesman's office, take hours to settle on a price that should take 20 minutes, then grind you in the finance office for every penny you have for insurance, add ons, warranties, undercoating et all, then have a big guy grab you by the ankles as you are leaving and shake you upside down to see if they missed any.
Only way for the consumer to protect themselves is to take a specific build they want, email it to 5 dealerships and get them to quote you an "ALL IN" taxes and fees included out the door price. Do not accept bids on vehicles that do not have almost exactly what your build sheet laid out, adding things like 4:10 gears, 50 gallon tanks, etc. later is VERY expensive.
Give them a timeline to get back to you and clearly indicate there will be no back and forth, guy with the lowest bid, gets the purchase. If you can wait on a factory order, even better but make sure the quoted price is fixed to time of delivery. Buy all add ons like 3M, undercoating/Crown, paint sealant etc on the open market. Shop the extended MOPAR warranty the same as you did the truck, and arrange the financing yourself. If you have a used car, sell it for cash to a private buyer or outright a dealership after getting a couple of bids, but at least you know what you actually got for it.
I bought my last two new vehicles this way. The last one was the 2021 2500 that I factory ordered to get EXACTLY what I wanted. Between 6 dealerships that quoted there was a $14,000 spread in the price. I bought from a dealer that was actually not the cheapest, by $500, as they have a great reputation for service and customer care, which has proven to be true. I got the truck I wanted for what I think was a fair price, and it was over $12,000 off the Build it Yourself, quoted MSRP.
It is work to do it this way, and many don't want to put in the work. If you insist on"convenience" don't complain about paying too much. Dealership has to pay overhead and make a profit. At least try to find a semi-honest one to work with.