Honestly yeah. Played winrate can be a interesting stat, and worth looking at, but it’s usually less important than drawn winrate or even mulligan winrate.
For instance lets say you have a deck where you’re looking where played winrate can be misleading.
Finishers like Bloodlust, grave strength, leeroy, charge and Smite or finishing combo pieces always had great played winrates, because you only ever played them when they’d win the game.
But while strong in certain decks, they could very easily be a weak card in a deck NOT designed for them. (Ex: Bloodlust in a tokenless deck without refill, vs one WITH good refill).
The priest quest’s shard is a extreme example of this. It has/had near a 100% winrate when played. but the deck (quest priest), actually IMPROVED it’s winrate from 41% to 45% MULLIGANNING the quest away in stormwind.
A card with a “100% wr played”… making a deck weaker in a deck designed for it is exactly kinda one of the deck building pitfalls if ur doing boring winrate optimizing.
Are they fun, yup! Are some very strong? YUP!. Should you throw every in? Nope. But is it fun to? YEEE.
Regardless arena is a mode where infinite value and endlessly repeating value can be a problem. Especially if the discovers are nut, you can chain draw. But you are also likely to have the mage 1-2 mana behind and not able to discover the same turn they need the answer. It’s outtempoable. Strong or good, probably yeah.
But i still think titans are more bs. Especially sargera’s infinite 6/4s in arena with a board wipe + 12/12 of stats and a giant body with board clear.
Tl;dr:
Yeah tbh, winrate when played is probably one of the less reliable statistics to build around. I still think Arena sargeras is more bull than Infinitize though lol.