Personally, I'd love to not have to pay for the contents portion of my insurance if I could, and if it would substantively reduce my insurance costs. If I had a fire and lost everything, it might actually be a blessing (forced downsizing). The only loss that I would regret are personal items like photos, keepsakes, etc.
If you have so much personal property that you have to insure it, then it may be time to re-evaluate your stuff. If you pay extra to insure jewelry, paintings, collectables, etc. then it either must be a store of value for you (for jewelry, I'd be skeptical that anything besides gold jewelry is) or you are really wealthy and have room to enjoy them. Otherwise, sell the extras and stop wasting money on insurance. MMM doesn't even insure his structure (self-insured), let alone all the extra crap inside.