The loss just on the lasers is 100x (i.e. delivered power is 1% of the input energy). Add in a combined cycle effeciency of only 50%, you're looking at needing a 200x improvement to have commercially relevant "net gain"
https://physicstoday.scitation.org/do/10.1063/pt.6.2.2021102...
Same article mentions that some petawatt lasers can fire more than once per second now.
Some reactor designs let you harvest electricity directly from charged ions: https://en.wikipedia.org/wiki/Direct_energy_conversion