Li Shenron
Legend
No.Do you personally believe there are any genres or themes that the tabletop RPG medium will not work for?
An RPG is essentially a cooperative storytelling method where each 'player' makes decisions for one character, and a 'referee' runs the rest of the world, with usually a bit of randomness beyond anyone's control to create uncertainty. Any genre or theme, if you can tell a story then you can do so through an RPG.
Only if you start fixating on a ruleset, or even just a mandatory degree of rules depth, then you can fail to tell the story properly. The RPG concept doesn't force any degree of rules, there are also dice-less RPGs for example, and they're still an RPG.