He means you are not spontaneously dropped into some action where you have no idea what on God's Earth is going on.
It does happen sometimes and is excruciatingly annoying and incredibly befuddling. You don't know what your ideal options are until it's too late.
e.g. You are dropped into the middle of a BATTLE, you think that perhaps you should stand and fight, rather than run away and get stabbed/shot in the back.
SUDDENLY, after you decide to fight, the Narrator cheekily tells you that you are an anorexic unskilled unarmoured unarmed child, and you die.
I hate that!
"Safe" starts let you wake up and eat breakfast or whatever while you find out whom your character is, and what they are capable of.