Point still stands - no vehicles electric or otherwise were using SiC until around the 1970s (and even then that was really niche applications) and widespread use wasn't until the 2010s.

Until then, we were predominantly using SiO2 MOSFETs and IGBTs.

You will note that timeline also maps quite well on when electric vehicles started to become viable in the market . Of course battery technology also had a lot to do with that, but efficient high voltage power electronics absolutely are an important part of the equation.