No, that is not the only way and you don't get to decide what the goal for everyone is.
Discussion
Yes it is
That is literally not fucking true. They could each hold their own keys, one could, two could. There are a lot more than one single way for keys to be managed. And I think it's retarded to delegate key management for an entire family to a single person. At least a single key. A multisig setup would be better, but still far from the ONLY way.
Think a little. It won't kill you.