Emotions is a weapon used against traders causing them to move out of a trade untimely which may eventually cost them loss.
How to avoid emotions:- set up a TP(take profit) and SL(stop loss) for your trades
- Stay away from the particular trade
- Get in some activity that will keep you busy
- Do your hubby activities at that moment
- set up hours interval to check your trade
- watch tvs and Go for walk

Note:Some of these might not be applicable if you are into scalping.
Trading is pure math. Emotions have nothing to do here
I don't think it's pure math as your trades can actually be different based on your emotions and mental condition. You won't be able to make the right decisions and make the correct trades if you are mentally unstable and vice versa. So, you can't say that emotions have nothing to do here, It's emotions that make someone panic and sell their assets, and it's also emotions that make someone FOMO and buy a token at a very wrong time and lose their investment or a part of it.
Your emotions can always make the best of what you do and it can also ruin everything, so emotions play a great role in anything that you do in life. Those who have control over their emotions will usually get success in whatever they do while others will have to face a lot of failures in life.
That's right, how can someone say that emotions are not involved in trading, I don't understand that statement. We must remember as you said that mental and psychological is very necessary, what is the use of it? discuss a little, mental and psychological will greatly help you in finding the right decision, okay you have a strategy that is 100$ accurate for example, but still if you do not have a good mental and psychological how can you dare to open a position, and obviously it will help you to minimize hesitation or fear when you want to open a trade. First you have a strategy that is believed to be effective and to perfect it you also need a calm mentality and psychology to be able to turn the trading results into profits. As you said it is absolutely true, this is not a matter of mathematics but also very involved with the mental and psychological of a person who can minimize your emotions to stay guarded,
it is not uncommon for people to make the wrong decision because they may be late opening a trade because of doubt.
So yes, the point is that emotions are very involved in trading and if you have a strong mentality and psychology to always remain calm then you will be able to minimize your emotions because if I let it maybe you will experience MC, that case has happened a lot.