It's not wrong in the sense that it sucks
(The same is true for card types that don't appear in most games, like plane or scheme.) You can't choose a subtype, such as creature types like Spider or Hero, artifact types like Treasure or Food, or enchantment types like Aura
We also run powerful support cards to close out games like Chandra's Incinerator turning all ping damage into creature removal, Laelia, the Blade Reforged growing into an enormous threat with Ob's exile draw, turning Ob into a 1-shotter with Temur Battle Rage, and protecting him from removal with tons of cards like Armor of Shadows
Another card to watch for is Gwenom, Remorseless
The card cast from Lurrus isn't exiled, so as long as it doesn't get removed from the graveyard through other means, you can always recast any spell you play with Lurrus on your next turn