We all as traders have that dream of making a good daily percentage in profit and steadily grow the account, but it's easier said than done because once in a while you will make bad trades. This is why I prefer going with risk reward ratio strategies at times
Imagine you make a profit of 50% after 3 weeks and just one bad trade when you have no proper risk management (stop loss) and maybe with the help of a risk reward ratio, your account is down by 70% because you were too stubborn to call it a bad trade. It totally makes no sense to trade like that.
I think some traders already make it a reality but it may not be consistent. They still can grow their account steadily though. I think that in everything that we do, there is always that "risk-reward ratio " but many of us focus only on the reward and not on the risk that they are going to experience. This make things harder for them. If we feel that we already profited a little higher, it's best to cash out most of it.
Stop-loss are a good tool in trading, but there are also traders who don't use it and they still can perform better. Admitting that we had a bad trade is not what you call a stubbornness. It's better than denying it and think that you are still doing well because you won't ever improve that way.