How about the rare earth materials as well as much more expensive metals in the motor and electronics construction? An ICE engine is well understood and you can pick up a higher performing aluminum block and head crate motor for ~$13k or so. The higher trim Tesla motors are ~$20k, and they can have up to four motors. That’s a huge difference.
E: y’all downvoting…why? OEM electric motors for cars like a Tesla are expensive AF whereas you can get a relatively inexpensive ICE (~$7k for a base model V8 crate motor). That’s retail, not the manufacturer internal price.