All the goop 'science' I've seen has been hilariously wrong (or at least it's laughable until you realize that some people are treating it as actionable advice).

That said, I've seen O3 (ozone) generators used to kill mold - in buildings - it's toxic enough stuff that they have to be evacuated, and I've swum in O3 treated pool water without ill effect (like 'chlorination' and 'bromination' treatments, it's an oxidizer and so can be used as an antimicrobial in the right dose). If anything, it was easier on my skin and hair as it doesn't upset the pH, so it's one less thing to be stabilized.

Finally, as I remember, Warburg's discovery was that cancer cells tended to use pyruvate (anaerobic) metabolism, so it was possible that cancer was an issue of mitochondrial disfunction; from research, that doesn’t seem to be a complete explanation. But agreed, it's a marker, not a cause (IMO more a result of cancer cells focusing on proliferation than anything else - but I don't have a background in this).

And thanks for the XKCD - I'd forgotten that one. :-)