Here is the wording from the Owner's Manual
"The front suspension and steering system of this vehicle was factory aligned using highly accurate equipment prior to delivery to the dealership. We recommend that the alignment is checked after you have fully loaded the motorhome according to your personal needs. If necessary, adjust alignment for the loaded motorhome. Thereafter, the alignment should be inspected yearly to help prevent uneven tire wear."
Thor or Ford did the alignment but Thor is recommending that it be checked after the vehicle is loaded.
Keep in mind that although the vehicle is factory aligned, it is driven to the dealer. In some cases this may be over 1000 miles of pot hole infested highways. I've seen vehicles get knocked out of alignment going around one city block.
Also, having a front end alignment prior to delivery can be added to a contract as a condition of purchase. The dealer can accept or reject the offer and the buyer can then purchase or walk away.