Your luck is different from mine. I see a manual in the glove box no more than 1/2 the time.

As for the original topic, I blame GM more than Enterprise in this situation. Some low-level person preparing Enterprise's offering may have checked an OEM equipment list and relied on it. GM purposely built a lesser standard of equipment (still legal, it will protest).

Last, statistics routinely show that SUVs are not the safest vehicles by several measures. Size can be good, but size used poorly is not, and a higher enter of gravity leads to greater rollover probability - a particularly deadly form of accident.