iPhone XR Back Glass Replacement

So I’m just about to replace the back glass on an iPhone XR that I bought. I’ve seen a couple of people gutting the phone completely and some people leaving the unit intact. I have no problem taking the entire phone apart as I’m quite experienced with mobile repairs. I’m using a combination of heat and IPA to take off the glass. My question is, is it necessary to gut the entire phone for this repair? I can understand taking out the battery but what about all the other components?