Actually the high income households are becoming a greater and greater share of spending, referred to as the "K shaped" economy. For example, the top quintile of households accounts for about 40% of all consumer spending.
But they only need so many robot housekeepers. And their standards are going to be higher than the average consumer's. If you're targeting that demo, slumming it with a $20k robot won't do; with the performance, bespoke service and maintenance, and other considerations, might as well bump up to $100k or more. But, in the current zeitgeist, you're not making an aspirational product, you're just creating another icon of class warfare that turns off the consumers you were hoping to eventually reach.