Presumably prices will come down as this market segment matures; it's not unreasonable to assume performance will double and the price will reduce by half within a decade. A $2000 brain in a $20,000 robot is 10% of the total cost but at that price point it's not prohibitively expensive for the market they're catering to. The unitree G1 can be had for as little as $16,000 usd allegedly but capable models can be north of $40,000.

If you're buying a durable good like a warehouse robot or household chores robot that costs as much as a car this doesn't seem like that high of a starting point for the market segment to me.