My language does reflect the new reality. By your own admission EVs are a minority.
Would you say that white people should be called "normal people" in front of a bunch of black people in the US, because the black people are a minority?
You talk about EVs like they're some obscure just-invented thing. They're not esoteric.
We're not talking weight, we're talking wind resistance.
You very much are talking both. For an extreme case, with freight trucks, aero is only like 1/3rd to 1/2 of aero losses. And they have aerodynamically awful shapes and are on very low rolling resistance tyres (though also have very heavy cargos... but also very large frontal areas).
For a passenger vehicle / truck towing a trailer, it will really depend a lot on the vehicle and trailer. It's not even some simple additive process, the aerodynamics is complex; it's actually possible to even lower Cd by towing a trailer in some cases (though not usually). And if by definition of the topic at hand (discussion was of a "big" trailer), then you're talking something like similar to the vehicle's mass (F-150 can tow up to 3 times its mass). Which - if on the same tyres - then doubling your mass equals doubling the rolling resistance. The ratio between rolling and aero resistance at highway speeds varies on speed, vehicle, tyres, weather, etc, but saying 60:40 aero:rolling is probably reasonable at normal "towing" speeds (somewhat lower than drivers without trailers) and averaging across weather conditions. Doubling the rolling drag increases the total drag by 40%. If your cross-section stays the same (again, this depends on the vehicle and the trailer), the Cd would need to rise by 67% to keep the ratio between rolling and aero the same. Which is a really big Cd rise. Now, if you're starting with a very aero vehicle and have a very unaero trailer, sure, you might pull that off and then some (but remember that it's not additive, the airflow is complex). Or if it's a low car and a high trailer, again, same story. But to treat rolling as negligible is just not right. Trailers add a lot of rolling drag, amounts that very much are relevant.