In my personal opinion I think that we don't need to focus on how much will lose and how much we own potential win. I always think that before doing gambling we should know our afford zone. And then we should make a strategy and set a limit then starting gambling. In this case I think we don't need to focus and your them lose and winning.
This your perspective is a good one but then it's very much applicable only when you are just getting entertained and be sure it's strictly entertainment you are doing and no form of expectations are involved , not the self decit of entertainment meanwhile you have some other expectations along side.
It's important you focus more on how much you are loosing and that's when you will be able to employ good risk management, this doesn't mean you will not give attention to your winnings, definitely you should also consider what you will get in return if this favours you.when you give attention to how much you could loose, there's this consciousness on how much you will risk because you now get to watch the amount you are risking as compared to your pocket size. Trying to strike the balance keeps you profitable because you know if you win, you are making this much but if you loose you will be Lossing this much too aswell.