If you could be a 95% effective doctor by using a $200 consumer electronics device, it'd be perfectly fair for people to be "Uber doctors" without going to medical school. And existing doctors would be up in arms, because technology rendered their investment almost worthless, not because they could present a meaningful challenge to the usefulness of "Uber doctors".
"The knowledge" may very well at one point have been a reasonable requirement for a taxi driver, but at least as GPS satnavs got good, it's just not anymore. The purpose of "the knowledge" today is only to serve as a barrier to entry to protect incumbents against competition.
Edit: Footnote on doctors: It's a poor analogy as a taxi-driver taking a poor route (picking good routes is the singular advantage the knowledge provides) doesn't carry anywhere near as bad consequences for the "patient" as a doctor making a mistake.
"The knowledge" may very well at one point have been a reasonable requirement for a taxi driver, but at least as GPS satnavs got good, it's just not anymore. The purpose of "the knowledge" today is only to serve as a barrier to entry to protect incumbents against competition.
Edit: Footnote on doctors: It's a poor analogy as a taxi-driver taking a poor route (picking good routes is the singular advantage the knowledge provides) doesn't carry anywhere near as bad consequences for the "patient" as a doctor making a mistake.