More context. ML made his first WTTC singles medal at the age of 21 (2009) and then two more bronzes (2011,2013) and first title in 2015 (age 27) but of course cleaned up until the age of 31 (2017, 2019). Fan Zhendong won his first WTTC medal in 2015 at the age of 18, got a silver at the age of 20 in 2017, missed the podium at 22 in 2019, and got his first gold in 2021 at the age of 24 (almost 25 given the delay in time relative to his birthday) - and of course they notoriously held Ma Long from competing. Wang Liqin also won his first title at the age of 24. Zhang Jike won at 23 and 25. Kong Linghui at 20, Liu Guoliang at 23.
When you take a broad perspective to this, I really do not understand what TBH wants that Harimoto is not doing other than failing to be Fan Zhendong. But choking vs ML repeatedly notwithstanding, there is nothing wrong with not being Fan Zhendong, who is probably the 100 year talent that TBH is looking for.
More seriously, I still find it amazing that someone can be written off as a failure at the age of 20 for not doing things that only one 20 year old amongst the post-1990 greats has achieved. And that 20 year old is not even currently considered the greatest player of all time!