Exhaust and noise are still a problem. It won't do much on a climate level, but even if we manage to reduce car usage having the remaining cars be electric is useful. Both noise pollution and particulate pollution have negative effects on human health.
Maybe it's just my bubble but most climate activists I see are primarily pushing for renewable electricity generation, and consumption reduction across the board in all aspects of life. They are usually also against cars generally but it's a secondary subject.