Believers saturated in grace can potentially become offended by Paul telling them that there's something they can miss out on if they keep persisting in grievous sins. "But aren't I saved by grace?" Of course you are. But something more than salvation is at stake here. If Paul's exhortations (and that's all they are) send you off on an anxiety attack or bring steam out of your ears, then the allotment of the kingdom may not be for you. Just revel in being chosen as a member of Christ's body and forget the rest.