To be objective, this amount is not critical for developed countries. In fact, this is income for 5-6 months (I can be wrong, but not much). Therefore, I would agree with the statement that it is just money. They can be earned again. And by the way, everyone who, for example, did not buy Bitcoin or Ethereum cheaply has potentially lost much more

You have the point but I'm detailing about the pointer about that "it's just money". Well, with such amount, if you're okay to lose 5-6 months of your income within a single night within a few minutes, that's still would hurt you. But you have to carry that on and just move on after wards and it's true that you can earn that again.
Once I started a business and worked quite hard (at first things were going well) but after a year of work I had to close it and I realized that I have as much as I had when I opened this business. Thus, you can say that I lost a whole year

And this is true, in fact, such a loss is not much different from a quick loss in a casino. By the way, I can't say that I really regret it - in order to succeed, we must take risks and temporary losses are inevitable. Perhaps that player reasoned in a similar way, another thing is that a casino is not the best place to give fate a chance since having received a win in a casino, you have nothing but money, but in the case of a business, if you are lucky you get a system that will be guaranteed to bring you income for a long time.