I think most traders are aware of the problem you raised, but to really control greed and discipline is a difficult process, many will give up right from the first step. .
As you said, it's a process.
As long as you went through that process and realization, you'll start to take notice of it and you might not do that mistake again. Unless you're too hot and you become aggressive with your trades, then nothing can stop you even yourself. Being aggressive is the reason why some traders are losing despite having the qualities and experiences that's enough for them to avoid such mistakes.