Ways to search for, discount, recur, copy, and generally synergize with creature cards are just much more commonplace, and even more efficient, than equivalent options for other card types
I love playing combat tricks with Sidar Kondo, but you want to be able to pump your creatures after blocks so you need them to be instant speed
can you imagine beating turn-1 Bristly Bill, Spine Sower
$5.99 Mystic Forge Universes Beyond: Fallout $2.29 Archway of Innovation Modern Horizons 3 $13.99 Swan Song Edge of Eternities Commander Decks $21.99 Inventors' Fair Kaladesh $1.29 Scour for Scrap Edge of Eternities $0.59 Goldmire Bridge Modern Horizons 2 $18.99 Uthros, Titanic Godcore Edge of Eternities $1.29 Noxious Gearhulk Tarkir: Dragonstorm Commander Decks $1.29 Thought Monitor Edge of Eternities Commander Decks $5.49 Vault of Whispers Mirrodin $1.79 Seat of the Synod Duel Decks: Elves Vs
Its a trading card game and we take pride in our cards
I feel like ten years ago this would have said Creature Tokens, and wed have had an expensive Izzet one for non-creature tokens, so that goes some way to framing how powerful this effect is