There's a difference between life expectancy and the pattern of failure modes. Good engineering designs in a preferred failure mode. For wheels it should be spokes rather than rims, since the former is more repairable.

OTOH if the intent isn't to be replacing spokes, or if the band of spoke failure is very narrow, then a near equal distribution of failure modes, can show that Mavic carefully dialed in the balance in component wear strength.

In any case, buyers have a very broad spectrum of wheels to choose from, and can seek out the best balance between weight, load strength, service life and cost for their needs and preferences. It's not reasonable to buy a light wheel intended for high end sport use, and expect it to last as long as a wheel intended for utility or touring.