If you're not using whole disk encryption (or even partial encryption), then it doesn't really matter if you use a login password or not. The attacker can just clone the hard drive to gain access to your files.
The threat model was casual passers-by. That may not seem much but severe disabilities change things a lot.
I am assuming that the OP is simply taking steps to mitigate an ever present fear of "being taken advantage of". There are some real arseholes out there, for example a friend of a friend was a blind dumb mute who was mugged in the street - nothing stolen except her cane and cards she used to communicate. She had no way to communicate with anyone, and they had no way to communicate with her.
Bang on, it's the horrible person who comes into the house of somebody physically vulnerable and steals pain medication from them (true story); those are the people that are the adversary.
Pain medication, from somebody with nerve fire… I just don't understand that mentality!
> I want my personal information secure from casual passers-by who after having a quick peck on the keyboard would more than likely give up; I'm not looking for PRISM dodging security here
