In the professional arena of CBA, many grass-roots players actually can't play their own level, or in the professional arena, their level is actually not enough, because in the professional league, they don't play by one person, but by the series connection of the whole team and the rotation of the ball.
In my opinion, there is still a big gap between many grassroots players and those with academic background, because many academic players have been training since childhood and have been adapting to the intensity of various competitions, while grassroots players are not enough. Most of them play because of their hobbies and have not received much professional training.
In addition, these grassroots players are generally not good enough in height and weight and are older. In the eyes of many teams in CBA, if you don't have excellent physical fitness and are very old, you basically won't take this risk to choose a grassroots player.