This completely misses the point. The stock-market is a gamification of financing. While financing has been invented to direct money to the most useful project

This completely misses the point. The stock-market is a gamification of financing. While financing has been invented to direct money to the most useful project, stock-market transformed this usefulness function into a score: the return on investment. The problem of the algorithmication of finance is not that we don't know where it's going, but that it's lost its objective of optimizing for utility in favor of optimizing pure profit. This has been a problem since the 80s with the "greed is good mentality". But that's not true, maximizing profit does not maximize societal utility.