Yeah. A mentor is good since he will be a teacher that will be guiding you in everything you are doing in the market. But even with the mentor, you need to be careful with trading because even your mentor is losing, just that most of them hide their losses and the students think they always gain from their trade.
A mentor is only good if he/she gives you some knowledge about trading but when it comes to trades then at that time a mentor isn't gong to be helpful for you in any way. A mentor can be a good motivating force but a mentor can't give you success in trading.
I believe most of the mentors these days are there only to show off to people that how good traders they're and how someone being their apprentice can have benefits and profits in trading. Actually the apprentice is more like a puppet but not a really student who may learn trading step by step.
The mentors are just social media influencers these days who want to grow their own bank balance and they don't really care much about anyone's success other than their own. I still believe that the ones who learn trading step-by-step can be way better than the ones who are guided by those so-called mentors.