Indeed they would be no longer games with your new rules and probably less enjoyable but that's me. Each to their own , eh ?
Foroom also hits on some great and main points. It's all about losing money and coping. If one gets upset, go home. Trading is not for you. It's easy to accept wins, handling the losses however is where it's at. Otherwise you could be the one on the bridge staring into the abyss wondering what the f**k just happened.
In my early years I was found crawling on the kitchen floor crying like a baby. That's a true story, although just a small one liner from the bigger picture. Mental health and strength is everything in this game.
And so, back to my opening post: don't demo trade. Put on real cash and see how you cope when you lose. If you don't mind losing, you won't mind winning.