I'm looking to install a medicine cabinet. It's an inconvenient wall. It's not load bearing, but it has two studs with power plus a third stud in the middle that we expect to need to cut through to position the cabinet where we want.
All of the tutorials I see include framing the cabinet with 2x3 or some similar material. However, I cannot seem to find any site explaining why this is done. It makes sense that it would be done to support the structural integrity of the wall, but I see such framing being done even when no studs are cut to install the cabinet. This seems odd to me, and makes me wonder what the real purpose of this framing is.
What is the purpose of installing all this framing inside the wall? I'd like to know so that whatever framing I do actually achieves the intended goal.