The Cardassians weren't torturing Picard when they tried to get him to say that there were three lights instead of four, they were just doing basic relationship management.

Joking aside, I think it's really fucking important whether or not the "fundamental truths" are true or not. "I'm divorcing you if you keep saying the Earth is round" and "I'm divorcing you if you keep saying that the Earth is flat" are not equivalent statements.

Plus, the Redditor is approaching this from the angle that her husband is brainwashed and never stops to consider that they might be wrong about something, especially a topic where their husband might have greater familiarity. They're being unreasonable and threatening divorce unless husband acquiesces. In my book that's emotional abuse.