Emotions will only ensure you incur losses that you can't and won't be compensated for but on the reverse, it enriches the platform as your loss is their win.
Any gambler experiences emotions while gambling. Algorithm involved in the distribution of winnings is not related to your emotions so there is no point in hiding emotions when gambling. Winning in gambling depends on the luck of the gambler and his actions, not emotions. If you think that this is not true - you have a chance to check it yourself.
I think however what we are saying is a fact in the world of gambling about the role of emotions along with their causes, this is why every gambler really needs to apply good self-control when they are involved in betting because emotions will only make them worse.