What will you do if after losing several times in gambling, you are left with only small amount of money and that money will be for your fuel or for transportation, will you still continue with the little you are left with? What if you lose?
If I loss on several times then I would I will take a break but I will not take leave from gambling. And once after rest I will try to gambling again.
Relaxing your mind and emotion is a good strategy, everytime you gamble, setting a maximum bankroll ready to loss is necessary.
Not only that, you need to set also on your goal to win, it's like making yourself being a professional gambler, and they are called professional for a reason.
I agree with you that we should not make any trade with emotion and we should make trade with relax to make profit as well as to avoid our loss. Otherwise we have to make only loss and we would never be able to make any profit.