Historically, governments justified the "certification" requirements imposed on people wishing to pursue various professions by the consumers' inability to share the information required to make an informed choice of a service provider.
For example, arriving to a new city, you don't know, what taxi company is decent and which hires serial rapists — the city hall should issue "medallions" to the good drivers and fight attempts by the non-vetted to provide the same services without paying the authorities their due.
Uber is showing, how the consumer feedback, that's easy to provide and is immediately available to anyone with a smart phone, obviates the need for such certifications — along with the associated costs and the abuse-potential.
Unfortunately, somebody will have to be the first person to write the "Woke up in the morning upside down in a ditch with my pants missing. Would not use again." review.