Induction motors require AC current, which is kind of nonsensical to create from DC batteries in electric cars.
Most DC-to-AC converters produce square waves that don’t play well with induction motors, and pure sine wave DC-to-AC converters are inefficient.
In the previous decade, with less efficient switching devices, that was a concern, however with current igbt devices, it’s not a problem.
Additionally, bldc motors in anything bigger than a rc car are generally sinewave driven anyway, to reduce stator energy loss, audible noise, and problems with smoothness of torque delivery.
Driving a 100hp motor with a square wave would ring a car body like a drum.