Just to tip the seesaw up a tiny bit in the other direction....
There are some benefits. Once a vehicle (car, boat, train, etc) operates with electric power, there are some possibilities that didn't exist before. The toxic emissions might be less KWH for KWH via scrubbing technology at a power plant that would be impossible on the vehicle itself. Also to the extent the electric power is generated from renewables, there is likely to be reductions in total emissions. CO2 sequestration might be possible at the power plant that would be impossible on the vehicle.
....and the long shot......if we ever crack the nut on fusion power, electric vehicles will be game changers. (Incidentally, many years ago I went to a lecture at the physics department at the University of Washington to hear a Nobel laureate gave a lecture on fusion power generation. I'll never forget this line from his talk: "Fusion power is the energy source of the future.......(pause).....AND it always will be." Hint....it was pun.)