To generalize: your lack of interest in an activity is not a good reason to remove that activity opportunity from everybody. I'm sure you have a lot of freedoms that you don't take advantage of - should they be removed as well?
Most people who do this do indeed use their daily drivers. Most people can't afford to own a second $30,000 vehicle they can take out only on the weekends.
> I think the main purpose is [...] not to remove options from people.
And I quote: "Google had long distinguished itself from other companies for committing to the development of a true robot car without a steering wheel or pedals."
http://www.businessinsider.com/waymo-ceo-john-krafcik-self-d...
The US hasn’t been purely free market since, well, ever. What’s to stop car companies from buying legislation to force people into subscription based vehicles? They already force the use of dealers for buying cars...