Actually this is a good advice and a big help also for those who lacks of knowledge , specifically to those who can't control their emotions when there's a bad scenario happen . But unfortunately opposite always happened nowadays which is they 're always panicking and ignore this kind of advice ,and always regrets as well. to be honest mate this advice will become useless because people nowadays are always struggled when it comes to controlling emotions.
as for those people who are in panic and having a lack of knowledge I can say that it is always harder to apply the knowledge that you have them to act like you're used to do.