Good point. That's why I don't encouraged job and trading all together. If you have a regular job like 9-5, how can you do trading after then? You are tired from your work and when you arrived in your home you will sit in front of your computer once again. And its takes a lot of time to somewhat "perfect" the art of trading. How can you do that if you can't spend a decent amount of time on it?
Plus as you have mentioned, money is involved so you have to be serious not to make hasty decision otherwise you will just lose your money on it because you can't concentrate and focus anymore after a hectic 9-5 daily job.