The Casino provided the cards, so if they were " faulty" or had a defect that could be exploitable then good for the person who can use that edge. The Casino agreed to Ivey's request to turn the cards around. In all those long sessions he also lost money, he didn't win at every hand. It's not like they offer to give the money he lost back. In poker, the players who are good at reading live
tells also have an edge over the other players, yet that would never be considered cheating. Nobody would ever think to tell Daniel Negreanu not to take part in a tournament for recreational poker players ( roughly any tournament with a buy in of less than 1000 USD), but he does have an edge over recreational players.
I don't think anybody wins from this battle. Ivey, his reputation is a bit tarnished, but financially he sold everything in the States, lives in
mexico and can play anywhere else except the US. Either way living in the US is not amazing for professional poker players, the taxes are high. A lot of pros are based in South America or Europe. And Borgata still won't get their money.