I made it too fun: what I said was at best an over-genarlization. The actual rules [1] apply to acrobatics and say that parachutes are required
for everyone when non-crew passenger is on the plane:
Unless each occupant of the aircraft is wearing an approved parachute, no pilot of a civil aircraft carrying any person (other than a crewmember) may execute any intentional [acrobatic] maneuver...
So without the passenger no one needs a parachute, with them everyone does.
It's perfectly legal for a 787 to carry a few parachutes just for the full-volume passengers.
[1]: https://faraim.org/faa/far/cfr/title-14/part-91/section-91.3...