Those are two very different things. The OP article talks about introducing air bubbles into the stream along the hull, the articles you linked talk about cavitation bubbles, i.e. water that vaporizes when the pressure locally drops. The latter collapse spectacularly and do indeed damage to surfaces. The former don't.
> Let’s forget about the thick layer of paint between the steel and the water...
If seawater oxidation around the boat would be increased then thick layer of paint should be thinned to prevent steel corrosion, which also means increasing cost of the boat.
[edit: clarified which articles I mean]