Having a mentor who is killing it in the market is essential in the trading industry, it somehow help to fast track your trading success and profitability. But trading is a personal journey base on your personal development, emotional control and market reactivity. The way you might response and react to market psychology might be different from the way your mentor might react. But having a mentor does not guarantee success and profitability in the market.
Probably a mentor might help but I do not believe that. The help comes from you by yourself. You can have a mentor but if you start to trade on your own, you will noticed that trading is very difficult and risky. And no matter what, as a beginner, losses are guaranteed be it if you have a mentor or not. I did not have a mentor and had some losses but I do not regret that I did not have a mentor. Learning about risky management is very important and I do not think anyone needs a mentor for that.
I think a mentor is only useful when it comes the early stage of beginners by giving out the basic information about trading, after this stage I don't see anything reasonable a trader would need a mentor for because trading is more of personal, a mentor can't be their for you always, you need to carry your cross alone. Trading is a responsibility you can't share with some other person, it is something you need to manage by yourself.
Mentor is good to guilde one at the beginning of trading but you dont need a mentor throughout your trading journey.