Ford B Max Advert in squarecuts

[Byron]

Why on earth not make it realistic ? - I suspect conservative Ford would want universal appeal for the car and not convey the "wrong" image in what must have been a very expensive promotion for them.
(In looking behind the scenes I couldn't work out where the model left off and the stunt man took over).

[Torchwatch]

They are depicting the diver as typical of the buyers of this car. An alpha male in the peak of his powers rather than the boy divers in the Olympics.
They want potential buyers to imagine themselves in the place of the diver, the men this car is aimed at might imagine themselves in square cuts but might not go so far as placing themselves in brief speedos.
Speedos or squarecuts it is still an impressive image.