If gambling is one of their method in growing their beloved bitcoin then we have no right to contradict even they posted that. That is their method and if newbie will do the same it's not their fault as the title of thread is asking for Methods of Growing "Your" Bitcoins.
No he is right. Even when someone claims he "grows" his bitcoin with gambling. It simply is not correct. Either he deceives himself by not thinking about the losses or he had a short time some luck.
But it is impossible that you have luck all the time. And mathematics can't be beaten. You will inevitably lose over time with gambling. Except you play something where you can change the odds to your advantage. But dice casinos and co are nothing like that.
So no, offering gambling to newbies is a bad advice. It it simply a mathematical proven sure way to lose your bitcoins. Not to grow them.