Stats show you EXACTLY what they show you. How many players on a deck lost against a deck.
They don't show you whether it was the deck or the pilot, whether the matchup is different at top vs casual level, whether any apparent weakness is addressable via tech. For sub-100 samples they're individual stories presented together moreso than stats tbh.
They can ignite your interest in trying to answer the above when you see Shen at 26% WR, but they're not answers.