Haven't you just fought your own argument? You've just said that a more expensive cable was better?
Also, i disagree with your first statement. A badly formed optical cable could cause a certain part of the signal to be lost and hence affect the sound. Just because you've never had this happen, doesn't mean it never has
You've obviously missed the point, intentionally or accidentally, I don't know. But my point is that, I'm all for a higher build quality on a cable so it lasts longer and doesn't fail due to wear and tear, but manufacturers try to claim that the increased build quality increases the quality of the audio.
But that higher build quality needs to stop somewhere. Especially, as I've mentioned a good few times, manufacturers making optical cables with gold plated tips. They've obviously set out to mislead the instant they thought of gold plating the tips of an optical cable. They claim the gold plating increases the quality of the audio. How? Number one, it's digital, it's either off or on, and secondly, it doesn't use electrons to transport the signal, there are no metal components inside an optical terminal.
Captain obvious there telling me that an optical cable is different to an HDMI cable.

Yet an SPDIF cable is different to an optical cable, but they regularly serve the same purpose. I can output sound from my PC to my AV receiver via optical or SPDIF, it's the same signal and sounds the same, except the bits are transported via light instead of along electrons through the SPDIF cable.
That's the similarity. An SPDIF is 'different tech' to an optical cable, but they get the same thing done, the transportation of digital signals. So how is that not similar to the way HDMI works? The cable isn't aware of what it's sending, it's just sending bits. An HDMI cable can also transport the same type of audio as an optical cable, is a cable with higher build quality, going to increase the quality of the bits it's transporting? Nope.
So no, I'm not fighting my own arguments. I have stated that I see a benefit in paying more for a cable that is more robust and durable, but I don't buy it for the perceived increase of audio and visual quality that some people claim exists.
Again, gold plated optical cables are manufactured with the sole purpose of misleading the customer in to buying something they beleive will result in better audio quality.
Next we'll be seeing gold plated sata cables sheilded by led to 'increase the quality' of the data on our hard drives.
Hey, buy our new gold plated silver SATA cables. They upscale your SD videos on your hard drives to better than 1080P quality!
That's essentially what's happening.
Oh, and another thing. Are you aware that a lot of places have invented this
gold plated more expensive is better by running false demos of equipment? It's common practise to show comparissons of expensive HDMI cables versus the cheaper ones, where they'll use a £100 HDMI cable to show the
good quality and apparently use a cheaper HDMI cable to show the worse quality, yet more often than not, the
cheap HDMI cable is actually a composite cable.