Your 99.992% is stupid. If something is only achievable by 0.008% it is rather almost impossible than almost possible. What Amazon did is not what you wrote: "There are a ton of companies out there that have made sustained, large moves over decades." It is not about sustained, large moves over decades. It is about doing what Amazon did. If you don't see the difference you are blind (or stupid). https://companiesmarketcap.com/ Only three companies could ever beat Amazon. So 49,997 did not. On top of that there are much more than 50,000 companies. Why are only listed companies considered? That's a clear confirmation of "almost impossible to achieve".
I daytrade and I see days where my daily return is higher than the daily return of the whole day (close-open I suppose as that is not clearly mentioned). So the situation for a daytrade is different. If you have a few trades a day you can beat the return of a simple end of day - start of the day. To make the statement for daytrade is impossible as it is different for each daytrader; depends on the system they trade.
Very good point. Over the long run the size of the losers has more impact on your performance then the size of your winners. The mantra of many great traders "take care of your losses & the profits will take care of themselves".