That means you can use it to avoid any targeted spell, any board wipes that destroy things instead of exiling them or just use it to avoid losing creatures in a big attack
"Game Analysis: The winning formula behind Pokmon Trading Card Game Pocket"
Decks are designed for different play styles, so they may want to match one to the type of game they prefer to play, or try something entirely different and go with the opposite of their norm
As time has gone on, this notion has trickled out through content creators and social media, and I think a lot of players out there are beginning to understand this piece
But aside from costing less than Maniac, the Oracle critically does not ask you to actually draw on an empty deck an action which, in most cases, leaves you vulnerable to losing the game should an opponent respond by removing Lab Man