If done thoroughly and the mistakes which would be done analyzed in the process, of course - it would be beneficial to a person in the long run. Truly, some charge head-on to make the profits, a crazy one at that, however, the market would punish such behavior heavily and the moment some deals are made.
Indeed, if mistake being analyze deeply and adjustment will be done accordingly then it will be beneficial for a trader to make better outcome, there's no accurate but anticipating the market from the past experienced may help you either to secure your profits or to minimize your potential loses, it's more on how you take care of your position and how experienced gave you the insight of the possible next market run.
The more you use your experienced the better you may anticipate your correct position, else, you can react properly if there's there's something wrong with your current position and adjust if needed.