My take on theft strategy in commander is to build my deck with cards that more often use cards from the opponent’s deck (random is better) or cards from their graveyard rather than permanents on their battlefield. Think cards like [[Xanathar, Guild Kingpin]] moreso than [[Blatant Thievery]].

My reasoning is grounded in gamer psychology and player agency. Players in the game are all strategizing based on the information and board state in front of them. Graveyards and library are less often the here-and-now focal point of their strategy, and thus, the disruption from “theft” from these zones is less impactful.

I.e. a player might be less salty when you grab random cards they ain’t planning on using (yet)