model y is an EV suv.

the problem basically is that the people driving model 3.the 3 itself is also fairly heavy, but the assumption that if they were going to drive a model 3, the majority would switch back to a lighter sedan when in reality, they bought the model 3 because it was one of the cheaper EV options, and had it not been a cheap EV option, they would have driven a larger hatchback or SUV regardless.

for example I had a coworker who recently got a tesla. what he was driving beforehand was a V70 Volvo hatchback before he sold it to fund the model 3. the hatchback is only a few hundred pounds lighter than the model 3, which effectively isnt a significant amount of weight, given an addition one, or two lighter people would already make up the weight difference alone.