The Royal sector is the seat of the Galactic Alliance. No sector is heavier guarded or regulated than this sector. If a pirate wanted to get in and out quietly they’d need to have someone feeding them security codes for any port they wanted to land in and/or refuel.
Many of the most notable families, clans, and houses of the alliance have their homes in this sector.
Also notable is the location of Chandler Shipyards primary hub which serves as their largest and primary construction yard and the location of their corporate headquarters. This location isn’t located in any system in the sector, but instead is kept in space outside of the influence of a star for security and experimental reasons.