Apprenticeships as a mode of learning

We mostly learn by doing, yet school mostly replaced apprenticeships as a form of learning.

One reason why schools replaced hands-on learning is that apprenticeship is suitable for smithing and weaving, but modern work is mental and needs dedicated training inside the classroom. However, this answer is false as many knowledge positions need some apprenticeship. For example, doctors must complete a residency, lawyers need to article, and grad school for scientists is really an apprenticeship.