Snow leopard wasn’t all that till it got a few updates either
https://www.computerworld.com/article/2528936/mac-os-x/snow-...
On the other you have giving access to your data to people who shouldn't have access, be it making them root, giving your encryption password in the hint field, ... You're not prepared against that, you have no mitigation and no remedy other than picking the right tool; either the tool you're using is secure or it is not.
Better everything gets deleted than someone not meant to have access getting it. And better something happens that I could insure myself against, than something against which I cannot do anything to protect myself.