Do you disagree that the advice is true? Your comment is not relevant to the quote.

There's no difference with the "real" world.

It's like you never read the quote, and if you read it you did not understand it.

We live our lives to the best of our abilities and sometimes things go very bad for us. What is unreal about it?

Let me guess: you definitely don't consider the possibility of trying your best to be realistic.