Now this isn't saying that perfect pedigrees don't produce some less than par outcomes on occasion.  We have all followed a recipe and had a poor outcome.  However by keeping with a general recipe you will have a much better predictable outcome in the long run.    You may not go down in history as having the most Uber Fantastic Chocolate chip cookie but you will have respect for your efforts and a reputation that some will seek out.  
Another thing I wanted to point out was a common thing I have seen in pedigrees.  I will use a key term here, "Lurkers".  Lurkers are people who search for the best ingredients out there.  They think if they can get the best ingredients then they will have the best also, even if they don't follow the recipe.  They think that if their Pedigree has the best even once or twice on there, that it makes their pedigree much more valuable.  People experienced in the Art of Pedigree know this is not possible.  Responsible breeders also look out for "Lurkers" and try hard to never let any of their stock into their hands.  
Sadly, as much as everyone loves the Chocolate Chip cookie, they are becoming harder and harder to find.  However websites are popping up every day with lots of Hodge Podge cookies.  Ideally breeders would put more time and thought into their breedings and use it as a learning tool.  Unfortunately it has become more of a fun hobby to see how many different little cookies we can create.  As a responsible breeder this will be my main reason for limiting the amount of pedigrees I ever give out and also limiting who I will ever place any of my stock with.