Nah, I agree with them. Gamers are way too into the companies and defend them with everything they got. There's nothing ok with sony or any other company banning you for a chargeback. They should revoke the access from that game only and not from everything else.
You don't have to be a fan of a game company to defend these kinds of practices. Anyone with experience working with RM/Finance/Fraud knows that for each one of these unfortunate incidents there are likely hundreds to thousands of unauthorized payments made by real actual scammers and card thieves. Making it easier to get away with these types of transactions not only hurts the company, it encourages fraudsters to keep on scamming until it becomes a huge problem like we have seen with phone/ebay scams that have gained popularity in recent years.
I would rather a tiny amount of users have to go through the process of unlocking their account (a lot of the time due to their own mistake/oversight) than have scammers find yet another loophole that allows them to keep on screwing consumers and businesses over.