captain
Contributor
Even if you memory is a little flawed, I can add an analogy.
Private Pilot Aeronautical Experience (Yes, you must pass the written tests too)
Sec. 61.109 Aeronautical experience
"(a) ... a person who applies for a private pilot certificate with an airplane category and single-engine class rating must log at least 40 hours of flight time that includes at least 20 hours of flight training from an authorized instructor and 10 hours of solo flight training..."
There are specific parts of training that need to be included just like scuba training, but the fact is: If you can pass the tests, the government will give you a license to fly that plane with or without a "buddy"... AND, you are required to fly solo BEFORE you can get your certificate.
Is this example off the beaten path? Not so much...
My daughter flew solo after 8 hours of dual instruction and her first dives were before certification.