Because we are not there in terms of Physics! They generated 1.5x the energy input through laser, but 0.0067x the energy consumed from the wall plug. That means we need more Physics, not just engineering!
The theoretical physics is working just fine here, if anything this experiment has demonstrated that Q > 1 is possible. The hard part is scaling this up and keeping Q > 1 for more than a fraction of a millisecond.
