You’re right, they’re not all used for transportation.
Yes I’m trolling a bit, one could argue a modern smart phone and the first cell phones are a bad comparison because they “aren’t used for the same thing” but that’s just needlessly pedantic.
In this case, I do think it’s fair to point out a crossover/suv being compared to a sedan is different enough to be a bad comparison, it’s not “Apples to Oranges” (why can’t fruit be compared?) but it is intentionally misleading for comparing cars of the same type when they’re not the same type and pointing at the size difference.