There is no such technology invented in the world so far that we can know in advance what we do will be profit or loss. If there was such a technology then no one would be harmed in business and there would be 100% successful businessmen in the world. Then maybe there would be no word of poor in the world, everyone would be rich. First of all, no technology has ever been able to predict anything in the past and will never be able to in the future.
Of course, no technology from past to present has been able to predict what will happen in the future and unfortunately we humans cannot predict it either. For this reason we don't know whether any of the plans we have made both economically and for the future will come to fruition or come true as we imagine. Anyway, I would like to continue my comment without going beyond the current topic.
Just as you stated, it isn't possible to predict the future in financial markets both technologically and from people's perspectives. However, it shouldn't be forgotten that history constantly repeats itself and past data are informative for future movements in economic markets. In other words, although it isn't possible to gain profit without losing any money by using technical analysis, it helps us to have an idea about future price movements and to make investment decisions accordingly.
As I mentioned, the fact that technical analysis is only a guide and doesn't help to get 100% accurate results causes everyone who does technical analysis to not be able to consistently make money. Of course, if this were an analysis method that could give 100% accurate results when done correctly, everyone would be able to earn as much money as they want today and there would be no such thing as poor.