Well, its not so much in making the bomb, but the particular ways of focusing the X-Rays and particular efficiencies in creating the tamper for the most velocity and thus most compression in the secondary.

The key thing here is the Lasers aren't doing the immediate compression, the lasers are simulating X-Ray radiation which then is ablating the casing around the tritium. Figuring out how to create and amplify a x-ray pulse was a major sticking point in the Star Wars program.

It's intended to confirm computer simulations. It doesn't have to be viable for the end article.