Scaling this wall in-canon would take a lot of effort and preparation, because you have to disable two layers of magical barriers. The WiB only makes it look easy.
Sigrún: Hey! This is illegal trespassing in the Embassy gardens. You’re under arrest!
WiB: Well, Captain, I sure am sorry about — look! A distraction!
Sigrún (thinking): That’s weird . . . for a moment I thought I was arresting someone.