Right. But slapping boiling water around the burning plasma is kind of a rube goldberg usually. See LLNL's LIFE design for example [1]. Things like molten salt walls circulating through a steam turbine and all that.
There are other ideas too, but it's hard to beat a Rankine cycle.
[1] https://en.wikipedia.org/wiki/Laser_Inertial_Fusion_Energy
