You have a point. Effort sucks though. Having to put effort just to get along with somebody is annoying, especially when the relationship is asymmetrical.

Conflictors are just the furthest removed from your inner life. And so you have to put in the most work just to maintain friends with them. All relationships require some effort tho, no matter how idealized. But with a conflictor why even try? Better to just go your separate ways, if possible.