It "depends".
Most people won't be able to see whether they are going to make it because they just need to work harder or whether they are just retrying a lost cause until after the fact.
This is especially true in investment when you may miscalculate the odds of winning and the return possibilities. So the most important thing is to make sure you can afford to lose before you invest, and whether you have the discipline to stay within the safety zone if something is going the wrong way. There is a difference between gambling and courageous.
Buffett and Munger also said they are best at avoiding the dragon than slaying the dragon. They could be right, and they are the type of investors and fund managers who attract that kind of slow and steady large scale investments. It doesn't work for everyone, but it works for whoever wants to invest with them.