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Those who wander aimlessly are equal to the dead and are passengers in a boat without a sailor. To this day those who have remained determined to achieve their goals have never been touched by extraneous or frivolous thoughts.
So we should go ahead with our goals and be satisfied with the results we get.Only don't set your goals too high is my advice. Then the satisfaction will be at hand. Go ahead slowly, little by little, and will reach even higher goals this way.
Yes brother you have rightly and logically said that if we cannot control our ambition then ambition will control us which will make our life hell. But happiness is inevitable only if we control our ambitions and prioritize satisfaction. There is a saying in our country that slow and steady wins the race. So working slowly and with the expectation of not giving up will bring success.