I think you are right, But do you know that you can also learn when you do not make mistakes ? By trying out a new stuff and doing things differently.
I think it is hard to learn from others mistakes, because you will not be made aware the steps that led to the mistakes.
And regarding good information, you need to source for that yourself.
Thats why personal research function is compulsory for every crypto currency trader or investor and even bounty hunters.