You can not ever have waste of your experience of life. Some people say it’s waste when you live in your past or you are lazy. But you only can live life of yourself, not theirs.
On the other hand, it is demanded that we taste each experiences more deeply and fully. Some people might have to face their own wounds of past and others might have to concentrate on themselves.
All begins from there. Your growth or change begin from there. Your future you create can begin only from your own experiences.
Why were you born?
Why are you living?
Where do you go to?