I know some software engineers like that. Some of it is knowing that the companies that make iot devices don’t give a crap about security. Some of it is plain ol paranoia. Mechanical door locks can be picked does that mean you invest in guard dogs? Crime is a thing but so is misanthropy. I think we should take reasonable precautions but believe that there are more good ppl than bad.
And those locks cost hundreds a piece. A "there is a security system here" sign would do more useful work. And a locksmith will tell you that picking is what you try AFTER you just try bypassing the lock entirely. Aka shim the door or break a window. Exactly what a burglar will do if they really wanted in. You do know that your garage door can be disabled with a coathanger threaded inside and grabbing the release hook, right? Or a jack wedged under with a crowbar, right? Or your decorative gnome in the front yard thrown through a window? Locks are a deterrent.