Dreadful sensationalist reporting. There's nothing "impossible" about it.
It's also probably nowhere near to being a useable tech yet, and may not be the best bet for large-scale fusion energy generation anyway.
And the story also points out that it ignores the 500MJ of energy used to power the lasers, so in fact it is nowhere near to outputting more energy than it put in.
So, yeah, still not an actual thing we can use yet nor even close. But it is at least another small step closer, which is important.