They can be Harold.
I can't help but consider the wiring methods of yesteryear when working on them, which is why i collect old code books
Much of it out there was installed by truly good tradesmen of the time(s) , neat, workmanlike and to the codes applicable
In fact, i'd wager they may have taken more time to details than we now do. I often find myself trying to view circuitry they way they might have
So when people ask me if their wiring is safe, i always consider the workmanship, and of course the enviromental effects that may have occured over time
Conversly, hopefully some future sparky will view our wiring in a similar light, and dust off an old tatered 2011 eh?
~S~