There is no reason to have a vehicle aligned if you are not experiencing difficulties like wandering or pulling to one side or abnormal tire wear. I did not read anything that stated this previously. The first part of an alignment is to see if the steering and suspension is within specs. The second part is to adjust those parts that do not fall within the specs. The tire center shot down doing the first part to sell you work that they say was needed before they could do the alignment. Typical sales pitch. Remember, You ONLY have 4800 miles on this vehicle! You did say that the sway bar link was found to be broken during an oil change. I did not read previously that you felt difficulty with the vehicle swaying in corners or excessive rocking. With the low amount of miles and the year of your vehicle I believe the sway bar link and bushing problem might have happened from excessive rocking from side to side at low speed. Maybe a very rough entrance road into or out of a campground. Did Ford say what might of happened? Did they cover it under warranty? If you are not experiencing any problems as I stated earlier I wouldn't waste money on an alignment. As far as dealing with a national brand truck tire center, I work for an international overnight delivery company and our tire vendor of choice is most likely the same national brand truck tire company you are eluding to. The bottom line is that it is run by ordinary people trained in sales and not honesty.
Stick with what Ford says as long as they are picking up the tab under warranty.