Because the vast majority of futures traders, before mastering enough futures trading skills, began to pursue quick or large profits, often in the form of heavy positions or large funds, but risks and interests coexist in the futures market. In the case of insufficient skills, heavy positions and large funds may also be exchanged for big losses.

You don't need too many such losses. As long as you lose several times, or once you lose too badly and unexpectedly, you beat the futures traders out of the water, or you have no confidence to continue trading, or you have been emotional in futures trading and can't treat the market rationally, and you are anxious, helpless and desperate because of uncertainty.