Eventually, it would make you better. Most people start right away, and that's wrong, they shouldn't do that, it just doesn't work that way. It should be done in a better way with demo account first. Lets see if people would be willing to do it, but I bet that they won't be able to do it just yet, it will take a while for that to be more common.
Demo accounts are good way to understand how the market works but we shouldn't rely completely on demo accounts because they don't give the real feelings of trading like a live account that has the risk of you losing actual money and not fake money as demo accounts do. Use demo to learn but before practice make small deposits as test for real money. If nobody is going to tell you, I'll because there's a big difference between trading live and using demo but with demo, you can practice your strategies and make them prefect to avoid mistakes when trading with real money. Beginners starting their journey in trading don't get it easy despite thinking they have gotten all the information needed to become professionals.
I agree, the sensation of trading on a demo account and a live account is not the same. The emotions generated by real trading are very pronounced, whereas when trading on a demo account, we may not feel the same emotions because there's no real money involved.
However, a demo account is very helpful in learning the ins and outs of trading, such as how to enter, apply take-profit and stop-loss orders, and so on. We can also learn to apply strategies and conduct analysis because there are so many features available for analysis.