The simple reason is, Torah will help you acheive the goals you set for yourself (assuming the goal you set is being an Oved Hashem).
Without a map, how can you check your progress? Without a blueprint, how can you build a stable structure?
And like any goal worth achiving, you need to have training from people who have experience (our gedolim, manhigim,).
A very qood question, indeed, Yita!