We won't be having this discussion right now if this person won the bet, I don't feel sorry for him because he was ready to lose the money, every one percent chance of winning a gamble doesn't clarify the winning, also it's hard to believe that this person is someone who is been greedy, he is rich because the money he lost is enough to change the life of many, he won't dare throw that away to gambling if he has no other big money like what he lost.
But it is possible that this whole story about such a huge loss may well be just a fabrication in order for people to discuss gambling itself more.
And more people would gamble. And by the way, these players, purely psychopogically, would make big bets, more than they did before. There is also an option that such a loss is negotiable and the losing player did not really lose such a lot of money.
So it is not clear what is true here, and what is just fiction and lies, which are actually hidden advertising of gambling. Or, it may be a hidden advertisement of a particular casino or bookmaker.
So I would not trust such information about a colossal loss at 100%
There is an old saying that goes "think wrong and be right", but in this case I think that you are going too far away in your suspicions
Although I won't deny the possibility that this news was originally shared in order to exploit psychological flaws and encourage people to think about gambling and, therefore, gamble more, I don't think that it is just a fabrication. It is improbable, but possible, that this kind of big wins and losses happen from time to time, specially taking into account that a few millionaires like to gamble ridiculously high amounts of money for the shake of fun.
Here is an example that changed my mind and may help you change yours too: I used to consider that reality shows were totally orchestrated, scripted, until I realised that, if I was the manager of the television producer, it would be much easier for me to find people who already were the way I wanted, rather than hire actors to perform the way I wanted.
That said, it is much easier to find a unique case of a 1.4 million loss in order to create a discussion on gambling, rather than "fabricate" it to encourage discussion.