In life I think true experienced is gained when a mistake has been made (beginners make mistakes), understood, responsibility has been taken and then corrected. Our greatest lessons come from the difficult times and that experience and the adjustments.

There is an old african proverb that says
"Calm seas do not make skillful sailors"

Unfortunately some people make the same mistakes over and over, take no responsibilty and therfore the problem never corrected. I wouldnt call that person experienced no matter how long they have been spinning their wheels.

Thats why we should learn from those with more successful experiences