This won't solve the problem because even if the casino publish the list of winners, there is no way to verify that those winners are real users and not just bots or fake usernames.
To make it as transparent as possible, the casino can partner with a reputable streamer and ask him to draw the winners on a live stream or use a provably fair system like giving each user a ticket number and use the blockchain (transactions/blocks hashes) to determine the winners.