Nothing else solves that problem either. Sure you can pass the buck from investors to someone else, but they also don't know what is correct. Everyone is guessing - they often have various evidence but it is never complete enough to be 100% confident in your decisions and so there is always someone guessing.
The difference is here the people making the guess are also taking on the risk of what if they are wrong. When someone else makes the decision they don't have the risk and thus less incentive to get it right. Also that "someone" making the decision tends to be making a lot of decisions and so are unlikely to spend enough time researching it, or alternatively since they don't feel any pain they will spend far too much time on research. (there is no objective way to say what is enough time in research)
The difference is here the people making the guess are also taking on the risk of what if they are wrong. When someone else makes the decision they don't have the risk and thus less incentive to get it right. Also that "someone" making the decision tends to be making a lot of decisions and so are unlikely to spend enough time researching it, or alternatively since they don't feel any pain they will spend far too much time on research. (there is no objective way to say what is enough time in research)