Says who? You can win with your high level of emotions, because losing and winning when gambling depends on luck, not your emotions, so someone who is emotional when gambling can win if its time for them to get lucky.
Exactly the same point as what I said before in this thread. The ability to control emotions is good to minimize the possible bad effect of gambling but it will not help us to have bigger chance to make money from gambling. There is no guarantee in gambling, whoever we are, how patient we are, how good our emotion control, how good our bankroll because Luck does not care about all these things. No body knows when the luck come, to whom the luck come, and how the luck come because it is like a mystery that we will never able to predict.
I agree with your opinion, because controlling emotions cannot be used as a benchmark in determining luck. Because in reality gambling only relies on luck. However, emotional control also really needs to be learned and applied when gambling. Because this is useful when you are in a constant losing position. Because from my personal experience and I have seen the experiences of several other gamblers. Not a few gamblers experience big losses due to losing, but force themselves to continue playing just because they want to return their capital. Well, that's the type of gambler who can't control his emotions to the point of harming himself.
Therefore, I conclude that emotional control is very important to apply when gambling. Because this can be a limit so that you don't get caught in too big a loss. Apart from that, in my personal opinion, it is very unpleasant if you bet too ambitiously and use too much emotion (anger). Because of course when you gamble but use too much emotion, you definitely won't be able to enjoy the gambling. Maybe gamblers who express too much emotion in gambling, in my opinion, only want to make a profit. And don't care about the fun of gambling.
But I personally don't blame gamblers who are like that (can't control their emotions). Because of course all gamblers have their own styles and desires when playing gambling.