I'm not saying that.

I'm saying that if one's goal was to save the environment they would focus on making those small cars, and as many of them as possible. Not Model Xs, not cyber trucks, not roadsters, etc

Improving efficiency of the least efficient cars is actually better at making a meaningful difference. Replacing a 20mpg average car with an EV that gets 80mpge makes a proportionally bigger difference than replacing a 35mpg car with one that gets 115mpge.

The least efficient vehicles have the biggest impact on the environment.

But I'm aggregate that gets lost in the noise due to the relative volumes.

Small 2 cycle engines like mopeds are the biggest contributor. Then small cars, these luxury cars are a small percent of global emissions.

Also, those people don't have to drive big luxury cars, they can buy these smaller cars.

There's room in the market for both of these types of vehicles. Asking people who typically buy big luxury cars to 'just buy a smaller car' would be nice in theory, but isn't going to happen in practice. There are many reasons, valid or potentially invalid, to own a larger car or a truck, and often you're not going to change people's minds on that.

I agree. I'm saying that the folks buying the former should not be doing so under the pretense that it's better for the environment, or society.

But, no, that's not right. If someone is typically a buyer of a ... Range Rover, or a BMW X5, or something like that, then replacing that car with an EV of equivalent size makes a proportionally larger impact on the environment than someone who replaces their Corolla with a small EV.

Your missing the point. An EV is not necessary better than a gas car.

An EV like the Plaid X or the Hummer EV actually use the equivalent of more fuel than the competition. A gas X5 is more energy efficient than a X.