I have different point of view tbh, I will not focus on how much I may lose as well as the potential win but I'll focus more on how to manage my money.
Too much focus on how much you may lose will not good as it will bring negative mindset mindset and can be something stressful for some people.
If you focus on how much you will lose, that means you will focus on how to manage your money, having gambling budget and not using more than what you can afford to lose. So this makes me not to completely agrees with you. It is good to focus on how you can lose for you not to fall victim of gambling loss.