If someone claimed they have the right strategy for gambling and winning more times than losing, why can't they use the strategy for themselves and change their lives first?

Why did they go around looking for people to teach? This is why experience after following a friend to a gambling group on telegram, but I am not ready to take the step in any other their predictions..

My question for you my friends is are there sport betting groups that gives betting calls that are legit? Because I believe that if anyone knows a way to change their life around, they won't tell anyone, they will enjoy the moments and pray it last forever.