It's not that he's wrong. It's that the implications of that statement are kind of frightening. What he's saying can be boiled down to:
- By age 15 or so, it is already too late for these kids professionally.
- Being well-rounded and trying different things is bad for you professionally
- We need to identify, find, and focus future tennis prodigies at a very early age
We thought it was a bad idea then. We thought it was unfair and dehumanizing.
We appear to have changed our minds.