it is unfair for players to hold onto a house without making use of it or decorating it. By enforcing decoration, GMs can ensure that houses are being utilized to their full potential. Decorated houses can enhance the gameplay experience for all players, as they can be used for socializing, events, and other activities. By encouraging decoration, GMs can motivate peoople to create a more immersive and enjoyable game world for everyone. Decorating a virtual house can be a fun and creative activity, and by requiring players to decorate their houses, GMs can encourage players to explore their creative side and create unique and interesting spaces. Without an enforcement of decoration, some players may hoard multiple houses just to prevent others from having access to them. By enforcing decoration, GMs can prevent hoarding and ensure that houses are being used fairly and equitably.

Overall, while some players may not like the idea of GMs inspecting houses and enforcing decoration, it can promote fairness, enhance gameplay experience, encourage creativity, and prevent hoarding.
It is necessary because people keep getting houses only not to decorate afterwards.