That's not the way Google works at all. The entire basis of Google's offerings is that they want to give you the most relevant search results possible, along with relevant ads. If they cease giving you the best search results possible, they know that it opens them up to competitor providing a better product.
The far more likely scenario is that the car will direct you to the nearest supermarket, but also recommend a couple of shops nearby or on the way that it thinks you might be interested in. If they direct you to a "theater 25 miles away", then they know full well that someone else will come in and provide a better search product - in the long term they lose.
There may be privacy issues with Google, there may be issues with the prominence of ads, but claims that they don't provide good search results are completely missing the point.
The far more likely scenario is that the car will direct you to the nearest supermarket, but also recommend a couple of shops nearby or on the way that it thinks you might be interested in. If they direct you to a "theater 25 miles away", then they know full well that someone else will come in and provide a better search product - in the long term they lose.
There may be privacy issues with Google, there may be issues with the prominence of ads, but claims that they don't provide good search results are completely missing the point.