The modelling and acting industry requires ambitious people who strive to be the best at what they do. Being ambitious is all about walking the walk meaning you set a goal for yourself and work hard to attain it. Remember that you should set realistic yet challenging goals for yourself in order to not be too overwhelmed. Unfortunately for most of us, if we dont work for what we want out of life, we simply wont get it. Life is made for those who are hard working.
Yes, it is true we cannot manage what talents we are born with, however we can control our ability to be ambitious and work hard. With that being said, a hard worker certainly does not warrant success. More importantly, capacity is nothing without ambition.
So, moral of the story: recognize the importance of ambition, not only in this industry but in your everyday life as well.