The verse says that the study of the scripture produces a perfect clergyman. But it does not say that the study of the scripture alone does that. In fact, the previous verse, verse 14 say that Timothy has to start with the knowledge he learned from St. Paul orally. "Profitable" or "useful" means that it is added on to something else, namely, the Holy Tradition of the Church.
The verse says that the study of the scripture produces a perfect clergyman. But it does not say that the study of the scripture alone does that. In fact, the previous verse, verse 14 say that Timothy has to start with the knowledge he learned from St. Paul orally. "Profitable" or "useful" means that it is added on to something else, namely, the Holy Tradition of the Church.
This is silly. Are you suggesting the entire series of letters from Paul to Timothy are restricted to Timothy alone? That the "man of God" can be limited to Timothy (or the clergy) alone?
Please note the "tradition" of which Paul speaks is past or present tense. The "tradition" taught by the Apostles was never hinted at as a constantly developing thing.