Yep, the truck would be much better. Unfortunately, I don't think the specs work in the way he might think it does. The Ascent, per their website, caps out at 5,000 pounds tow capacity. If that 4,400 is GVWR, he's probably right at the limit of the ascent once loaded. If that 4,400 is dry, however, he's likely overloaded by a good 10-20%. Start talk about hitch ratings and payload and I'll bet you start finding other ratings that are out of line as well.
You're dead on - cart before the horse. Sadly, not a new or unusual tale that we hear on these board.