You don’t gotta be impossible to steal from, you just gotta be more annoying to steal from than the next guy.
Sure you can use all number of locks, security bolts, and stripping the bike down yourself every time you leave it, but it’s sucks. You’d rather public spaces just be safe.
If there's lot of theft and you can't store bike at a secure place - have a cheap bike.
not sure the game you want to go with examples
But the rule is good. Can't say I always adhere to it, but used to loose a lot of stuff , and thanks to the rule, many wasn't that expensive.