@bguild I have to thank you for your amazing write-up! You gave me the confidence to purchase a 2021 that just came off lease, even though it had captain's chairs when I needed a bench seat. To your point, I can confirm that swapping captain's chairs for the bench seat does work!
The downside - I just discovered - is that I got the bench from a 2020 XLT, which does not have the powered fold-down feature. In and of itself, I'm not too bothered by that, but, it lacks the wiring harness and control unit that provides power to the rear-folding seats. I did not realize this while I swapped all the seats, and now my 3rd row is stuck in the flat-down position.
So, I'm going to have to get the harnesses reconnected so I can put the 3rd row upright. And then, I need to decide how to proceed. I'll either remove the unit from my captain's chairs, or find what I need from a junkyard for a reasonable price. (I plan to put the captain's chairs back in someday when my kids have grown up enough that I don't need 7 seats.
I did manage to get the seats for only $213, so I can't complain about the cost. And the work only took me a few hours today.