One must wonder exactly what the author was thinking about here! If the notion of making deliberate mistakes means carefully selecting mistakes( as suggested by the author) which will have the lowest impact on production, outcomes, or even a company's profits, then their threshold for pain tolerance is low and the experience gained is nominal. However, if you throw in all your chips and go for the "deliberate mistake" with the greatest and most serious of repercussions, you may experience either a worthwhile and memorable success or a horrible loss.
In other words, I am still trying to wrap my head around this concept and think that if you feel comfortable with "planned mistakes" (since you are the one selecting them), how will you be better able to cope with the sometimes dreadful impact of the more common unplanned mistakes?