Anyone that dies without giving control of the wallet that they're hodling their Bitcoin in to their heirs are doing the network some good because they're making the scarcity of Bitcoin to increase and this is adding to the value of Bitcoin. The more Bitcoin that gets lost, the more we get more demand than supply in the market.
I don't think i will be happy hearing that if i'm one with the famliy of the lost person.
It's not about the network anymore, it's the people who you love and not having grasp of what you earned, saved and worked for, for several years or so that it just vanished that cannot be recovered due to the fact that the person always follows, "don't share your keys even at your love ones", well, i don't say you do share it while you're alive. At least make a note and give hints that is understandable enough for them to recover your wallets if something happen to you. Have that backup thought, that thought will save your family even if you lost.