There is a difference between someone who goes rock climbing and a climber, someone who goes skiing and a skier,someone who tells a lie and a liar, someone who gets their black belt and someone who is a black belt.
The learning, training, evolving doesn't stop at black 1. The path is long, involved and filled with opportunity. But if one doesn't walk it, they cannot see it. That's my very very humble view from my standpoint at Dan 1.
This poor fellow either approached his training from the standpoint that he had a goal to reach and that was it, or was taught this, or both.
Do I walk better at 40 than I did at two? Most definitely. Do I speak better, eat better, understand people better? Of course. I think I'm different than I was a month ago, let alone a decade ago.
Learning is a state of mind, not a laundry list. And if one thinks there is nothing they can learn in any possible situation, they are not of the mentality of learning.
Now ... I've heard people criticize others who seek to continually learn - not just martial arts, but anything - rather than put their skills to work and be productive. How about a balance? How about some work, some striving, some service, peppered with learning? There is NOTHING wrong with learning. I learn from babies. Can you?