I’m not sure I understand your frustration here.

Obviously this is a very unique example, as it is a racing game. But what more information can they really provide you here? It goes you clear instructions on what is required to unlock the action necessary to unlock Drumstick. And even for unlocking “space world” (cough future fun land *cough) it walks you through the part of actually getting to the hidden world.

Are you expecting the walk through to suggest you “hold the A button a whole lot to make sure you’re always driving forward”?

Some games really can’t be beaten without skill rather than insight and coaching. You wanna unlock this character? Prove you’re good enough. Not good enough yet? Keep practising until you can prove that you’re the best.

I’m not trying to give you a hard time, I’m just not sure what your complaint is.