Efficiency.
No matter how you filter the exhaust:

Ice engines are ONLY 15-25% "efficient". for every dollar you put in the tank only15-25 cents worth moves the vehicle forward. The rest of the energy created (heat) is tossed overboard into the windstream through the coolant system or exhaust. Or lost to mechanical friction and Pumping losses.

An electric motor has three moving parts the rotor, and the two bearings that support it. Not much if any of a transmission is required. No clutches. valves. timing chains; oil& fuel pumps. O r the 1500or so , moving parts that require lubrication ,adjustment, and replacement..

Electrics are 90-95% efficient. 90-95 cents of every dollar of energy is used to move the vehicle; and that is reason enough. They are just "better" in every measure.

Battery chemistry improves every week.