But that wasn't with any black hole and it's not Hawking radiation. Basically they could as well have simulated that experiment on a computer and said the same

But that wasn't with any black hole and it's not Hawking radiation. Basically they could as well have simulated that experiment on a computer and said the same thing (that what they got is similar in nature to Hawking radiation). But it's just similar - Hawking radiation relies on a mashup of GR in a strong regime and quantum field theory extravaganza, it's something you would very much want to observe for real as those theories don't normally fit together very well. I'm not sure you'd want to be close enough to observe it though :)