Honestly, having tactical nuclear warfare be a bar mission for chump change is pretty dumb. It's an act of war, no raid or skirmish. It would be like if a mercenary dropped a nuke in the 80s, it wouldn't be done for some random warlord for a couple million and a handshake.
And anyway, from a gameplay perspective, I only end up doing this mission against Pathers and Pirates, because breaking their stuff has little consequences and their planets are mostly poor mining colonies that don't really matter. I never bother picking it up otherwise, as making factions hostile is a long-term thing that takes a long time to go back on.