You just twisted the meanings of the words.
An amateur is not a master nor a disciple of a master (e.g. future master).
The vast majority of amateurs have no ambitions nor passion and simply give up early on, that's a rose tinted view.
Since they don't get paid to do it, they have to allocate their precious free time toward the skill, which means they don't have those 40 hour weeks where they spend all their time honing their skill to begin with.
Even someone who does a skill half heartedly without passion nor ambition is going to learn faster with those 40 hours at his disposal.
>The amateur is the one who hones a tool’s edge until it’s razor sharp, and cuts away all unnecessary detail until they’ve found the essence of what they’re trying to achieve.
That's not an amateur and you know that. By your logic Japanese master craftsmen doing this are amateurs.