It's a good point to bring up. If our national team bowlers have average FC records, then how do we expect them to do well in the international arena? That being said, we also have to bring this point up as well, how much can we take out of these domestic statistics? Because remember, the NCL is known as "picnic cricket" and while these players could have success in domestics, they might not be cut out for international cricket.
Take a look at Dollar for example, the guy has been consistently been taking wickets at the FC scene in BD, but what does he do once he goes to India in the A team tour? He ended up being nonexistent. Kazi Kamrul has also been nonexistent at the Academy level. So this might be the reason as to why our selectors are sticking with the guys we have. They're probably going in with the mindset of going in with the guys have with pure potential instead of domestic stars.