I've always wanted to learn to sing.
I've read books about singing.
Watched videos.
But singing isn't something you learn by watching videos or reading books.
You learn it by doing.
A singing teacher can be a great help. "Not bad. Try again with your tongue flattened slightly and the tip touching the back of your front teeth."
The challenge is that teachers can be expensive. Finding one you gel with can be difficult. And none of them are going to spend twelve hours a day listening to you practice tongue placement.
For much of history, mastery was learned through apprenticeship. The challenge is that apprenticeship requires constant attention and feedback - which doesn't scale. Books and Youtube scale information and instruction. They don't scale attention. They are passive.
AI isn't.
It is always available.
At three in the morning.
Patiently.
For free.
For the first time in history, that kind of attention may be available to everyone.