Even heard the phrase “practice makes perfect”? I suppose if you accept a number of assumptions and generalizations, you might consider this to be true.
Better, though, is the following phrase:
Perfect practice makes perfect
Practice doesn’t do you a lot of good if you’re practicing doing things the wrong way. If you spend 10 years playing piano with your wrists resting on the lip of the keboard, you’re not likely to be as good as someone who has spent 10 years holding their wrists up, just like Mrs. Old-Lady-The-Piano-Teacher told them to.
I think the same thing applies to experience. I’ve noticed that people assume that experience in creating software is valuable. Experience can be a valuable thing, but not neccessarily. Some people are highly experienced in creating software the wrong way. For those people, I’d say their experience is as much a hinderance as it is a help.