Your mission is to hit the mark
As Agent 47, you’re free to take down your targets in any way you please.
As in Blood Money, part of the joy is that you’re given the space to stop and observe. 47 has an invite to the fashion show his targets are running, and so has some limited freedom to wander.
From there, access is layered.
A key feature is the disguise, from palace staff you can roam the ground floor and basement, but access to the upper levels remains restricted.
Other disguises have other restrictions – and that I suppose is where the wit of your game playing takes the lead.
Action packed Hitman is a game of skill