it's entirely possible to become a good trader without taking heavy losses at the start. Preparing thoroughly, using demo accounts, and studying well allow for learning without risking money. Confidence also comes from preparation, and a beginner doesn’t necessarily need costly mistakes to improve
While losses in trading is inevitable, heavy losses can be avoided with a proper risk management even if you’re a newbie as long as you have prior knowledge of it before going to trade and you strictly stick to the risk management without going against it, be cause it’s the reason why you see many newbies later ended up with heavy losses not that they don’t have proper risk management but sometimes the euphoria of winning trades back to back leads them to go beyond their risk management strategy. Also newbies can improve if they choose to get better but the reason why loses are what drives the tool is one is always because it is a lesson learned the hard way and without it as human we fail to leave our comfort zone and if a trader doesn’t actually looses then they believe their strategy is the best and they never try to improve move and that’s why many people regard loses as the best tool to driving the force for improvement