Unfortunately, the nature of the giant, you can go and do anything anywhere and there's SI involved game, things like that are done for a reason. Explosions, gunshots, exploding/vomiting zombies can wreak a POI, which can make getting through it confusing, collapse loot rooms, make the whole builds unstable, things like that. So, using harder materials and painting them to look like wood/carpet is standard procedure.
Now, if there's something like steel being used as a piece of a tent, that's a bit much . Thanks for reporting it though