- The Tyrells were rebels right up to the Battle of the Blackwater, so it’s not like they have any leg to stand on w/r/t that topic.
- They’re rather ignorant and dismissive of the North in general, so that’s another reaosn why they don’t care.
- Tywin’s not exactly that good on the issue either, given what he thinks about the Night’s Watch and Mance Rayder.