The life others have lived will not determine how ours will turn out to be. It is true that people do things and fail. The fact that a person did something and could not go through or finish it does not mean the same thing will happen to us if we do a similar thing.
The methods people use will be different from ours. We may have people who will tell us that they tried, or their parents or friends tried and could not do it. What these people will do is put fear in us when they find out that our goals are beyond their imaginations. The fact that a person did something and failed and gave up does not mean the same thing will happen to us. There are some things we are the only people who are meant to start them.
All that we can do is to stay away from them. A lot of people like to sit on the bench and not take any risk. If all the major breakthroughs and inventions had been ignored because of fear; where would we be? Starting something no one or a few people have done is risky and scary. All sorts of things rush into our heads and the negative monster of possible failure will stick its head out.