People who educate themselves are outliers already.

> Would you let a self-though doctor put his hand on you?

There are consequences here beyond time and money so it isn't nearly as much of an apt comparison.

> did not do practice in a "real hospital"

Medical doctors already go through many years of residency as well as continually take standardized tests to keep their medical licenses.

Also lawyers in California and Louisiana can skip law school by passing their boards (and undergoing a type of apprenticeship I believe).