It's more than a party trick. We've done several 200+ mile one-way road trips using NOAP - and it does make driving easier, even though you still need to monitor the AP software in case it makes a mistake.
On our last trip, I got stuck behind a vehicle that kept riding the left passing lane on an interstate highway. The driver would drive around speed limit+5 most of the time, but whenever the driver approached any vehicles in the right lane, would slow down to speed limit-10, which was especially a problem when passing a long line of vehicles in the right lane.
After dealing with this for a while, found an opening to pass the car and get in front, though it required driving for a brief moment above 90 MPH (since the driver, of course, sped up to try to keep me from passing before hitting the next line of vehicles in the right lane).
I forgot to disable NOAP - and was immediately issued a warning that AP would be disabled completely for the remainder of the trip.
For the rest of the drive, being unable to engage AP reminded me of how much easier it was to drive with NOAP engaged...
Is it the same as FSD? No, but like cruise control, TACC or lane keeping, NOAP features do help, even if you have to keep your hands on the wheel and oversee the software.