i lost 1 btc at the old edition , it was very hard to win and no provably fair as now
Looks that another player have lost big at gambling and saying that the site is not provably fair, Bitdice have been around for a long time and have a good reputation, you can always verify your rolls on their site, learn to accept losses if you want to gamble, gambling always have it risks.
Maybe he was frustrated because of losing 1 BTC so think sites that are not proven to be fair. You're right, preferably before gambling should know the risks so that if lost will aware of the risk. Win and lost, profit and loss in gambling it is fair because this game.