I could provide you a thousand links the earth is flat, and I am sure 100's of thousands more that support things that are wrong.
I provided a decisive explanation for why your belief was wrong and how you misinterpreted a technical website to reach the same conclusion.
Stranded wire is the primary method by which skin effect is reduced. At low frequency and DC solid has a marginal advantage due to slightly larger conductive cross section. At upper audio frequency's stranded wire will carry more current and heat up less due to reduced skin effect. These are well known and we'll established causes and effects.
In terms of noise for audio, that is made up with no supporting evidence. I can't refute made up any more than you can provide evidence to support it.
In terms of corrosion this seems valid for bare copper but once a connection is soldered or properly attached to a connector this would go away. There are also wire coatings that don't tarnish.
Your key points for cable design all sound important but they are akin to witches brew. There is no basis in them. The helical construction is an inductor. I would not be surprised if adding an inductor to the signal path didn't change the sound. That's not a mystery.