Solid traders indeed move forward quickly when making a bad trade that costs them money, but I am not talking about these traders. I am talking about the people that can't accept any losses, and don't know what they did wrong, and when to stop.
If you mean those types, then they should rethink and consider another line of source of income because they are not fit to do trading. Trading could be harsh and brutal at times, and if you can't accept losses then find another work.
The lost are not just applied in the trading but all of the another job are having the opportunity get a lost too, but just different in the percentage get a lost and trading is there in the middle place.