building

I have a very big question in my head. Why build a building can always according to plan and they will be able to foresee everything ahead. But it will not be able to apply in our life? Then architectural engineer will able to manage their life well? Since they are the one who plan everything out. I just don't understand how everything goes. I want to know the truth... I want to know if we plan ahead, everything will go the way we want? So that mean getting rich also can have a perfect plan to follow. Am I right to say so? I would like to know the formula and work hard toward it. I don't mind hard work, as long as I can achieve whatever thing I want.