I've worked with quite a few people who had "15 years of experience" which would be better described as "one year of experience practiced 15 times".
The main thing that such an internship-apprenticeship system guarantees is that the newer generation is well-versed in the ways of the old generation, and will likely have a similar record.
In a conservative industry, such as civil engineers building bridges, roads and buildings, and electrical engineers building high-voltage electrical distribution systems, this is what you want -- those industries have converged on good safety records. You want a few people who innovate, but otherwise much prefer to delay the future by 10-20 years than to the potential risks of bringing it sooner.
If the same was prevalent in software, we'd likely still be coding in COBOL on IBM mainframes.
Tesla is a very interesting case study - actually managing to bring the future sooner (with relatively small accumulated damage so far) in a field where being conservative is considered a virtue.
If you'd rather work with the apprenticed person, this model still exists in banks, who are willing to pay big bucks to maintain their cobol backends.