I'm not sure if cars use more energy than LLMs; huge "citation needed" there. But for the sake of argument, let's assume that they do.
Cars use more energy than LLMs because most of the world is built around requiring a car to get to places.
It's not that we don't mind it; quite the contrary, in fact, as we're always reminded of when the price of gas/petrol shoots upwards.
When the cost of living forces you to live 45 minutes away from your job by car because living within walking distance is astronomical, many folks are conditioned to want a house with a garage "for the kids" because apartments are "for the poor," and EVs, in their current state, are not financially feasible yet (though that is changing!), it's more that we're forced to tolerate it.