Exactly, it's not even unique to the monarch in countries like Denmark. Government offices are rebrand, restructured and renamed far more often than the king or queen. The major difference is that the government offices rarely do a slow transition, they change everything at once, rather than just replacing the logo on things like uniforms, tools and buildings when the object needs replacing or refurbishing anyway.

Personally I feel like the rebranding of government office just because some one is "up for a ministerial post" so we need to create one, is far more wasteful.