Because, lest we forget, if an equipped creature changes controllers, the Equipment cards remain under the control of their owner
But Animar can be answered by targeted removal of the Red (Chaos Warp, burn before the counters arrive), Blue (Pongify effects, Imprisoned in the Moon, stealing, bounce), and Green (Beast Within, Desert Twister, Song of the Dryads, etc)
That's super strong
If a Set card(s) in your Spell & Trap Zone is destroyed by an opponent's card effect: This card gains 800 ATK until the end of this turn
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Steve Warner, Game Design Manager and lead game designer for Disney Lorcana at Ravensburger, mentioned in his communication that Ravensburger reviews constantly the overall competitive scene also with the support of a group of players and influencers and that's how they realized the way these cards were strongly shaping the game