It was not long after we realised that each kid wants to become what their parents want them to become. If parents want them to be a doctor, then being a doctor becomes their own dream. They eventually find it difficult to remember their dream in the long run. 99% of the population is going through the same, which eventually leads to unhappiness and regret.
There's a very thin line between having a dream and having the zeal to fulfil it. Not many have that.