I second you on this thought. The positive mindset is good, but it is only progressive if used in the right field or activities. Gambling is not the right place to have a positive mindset, it's better you use the gambling mindset in gambling, because with that, you will be prepared for the worst.
If you are using a positive mindset in gambling, you will only find yourself repeatedly gambling regardless of whether or not you are losing. This is just a motivation that can put you in trouble of persistent hope that may never be fruitful.
This doesn't necessarily mean that you will continue playing regardless of whether you're winning or losing. If you set a budget limit for yourself, you will simply stop, and a positive attitude will just help you cope more easily with a loss if you've had a bad day. So, positive thinking has a good effect on all areas of our life, but how much we lose depends on the limits we set and on our discipline, which can keep us from continuing to play further.
Yeah much better that way, if you set your limit then go ahead and stop once the limit already reached, there are times that you can be lucky and can take away decent amount of winnings out from the house, and there are times that luck is not at your side and you lose some of your deposit, it's pretty normal as there's no assurance when you are inside gambling better make a best of use of your luck and enjoy when oppotunities comes around and let you win if not, then be aware and ready to accept the outcome.