That's due to battery prices. You can't pay $25,000 for a battery, put it in a shitbox and sell it for $30,000 because nobody's going to buy a $30,000 car with the features and quality of a $5,000 car. Batteries can only be maybe a third of the cost of a car, so everyone's been targeting the top of the market with expensive EVs.
The good news is, battery prices are continuing to plummet each year. When you have $2,000 batteries, $12,000 cars are doable.