Those are some pretty reasonable points, and the cables do seem to be more fragile than I would like. That said, micro USB cables are a bit worse, and the lightning socket is a great deal more robust than micro USB.
The circuitry in the charging cable isn't the problem anyway - the problem is Apple's business practice of charging companies a licensing fee to use it. This is something that should probably be prohibited by law, but since it's not you can certainly see Apple's point of view (more $$$, yes please...). The IC probably costs about 10 cents.
So where are these circuits in USB, FireWire,or typical display port cables?
Well, USB has all the smarts at the other end of course. Display port cables do contain circuitry - or at least some do. USB to serial, or VGA, or audio, or whatever most certainly do contain circuitry. I don't disagree that it seems unnecessary to put an IC in the charging cable, but if you don't abuse the thing they do last.