> Not everything needs to be absolutely 100% secure so long as you control the system.

Isn't that a bit like saying "you don't have to worry about home security as long as you are the only person who has the ability to enter your house"?

Sure. I don't password protect my (Android) TV like I password protect my (Android) phone, despite both of them allowing authorized access to the same Google accounts, because if someone entered my house I have bigger things to worry than them using my TV.

Not at all.

I mean yeah if you're truly the only person that has the ability to enter your house then why should you worry about home security? Nobody else has the ability to get in.