Centro's comment makes sense in the context of the current version of Centro.
I believe he could have had great success if he moved to the 5000m sometime after 2016 at the same time, why would you do that in the 4 (5 in his case) year period where you can capitalize on being the defending Olympic champion? It didn't matter that he was getting beaten or running slower times than other people because he was the current champion.
Now that he would be uncompetitive in the USA at the 5000m, what would be the point of moving up? He's not making a US team a 5000m in 2024.
In 2021, if he'd been aiming at that for the 2-3 years before it and stayed uninjured, perhaps he'd have been very good. He did run 13:00 in his only real serious attempt, and perhaps people forget that as a high schooler his 3200m/2 mile time was more impressive than his mile time. I always thought Centro was a longer distance talent who might have been much better at the longer stuff but ended up in the 1500m because the US and the world were relatively weak at it and he ended up having great success, so why move up, especially when the 1500m is a more marquis event on the circuit.
I don't agree with him that no 1500m guy would want to move up. I think people would move up if they were going to be more competitive and/or compete for medals. Which is what I think Cooper Teare should do before it is too late.
Regardless of whether the 1500m is the glamour event or not (I think it is more highly regarded on the European circuit), it cannot be ignored that the most well known distance runner in US history is a 5000m guy who never medaled in the Olympics. Regular people in my office know all about Steve Prefontaine but have never heard of Matt Centrowitz, Jim Ryun, Lionel Manzano, or any of our medalists at 1500m.