It's absolutely not crazy talk that electrical current in the body is likely relevant to the healing process.
Cystic fibrosis is a genetic disorder that makes people extremely vulnerable to infection, though I don't think current medical science knows why. It's a salt wasting condition and salt is an electrolyte.
The most common test for CF is a sweat chloride test which basically determines how salty you sweat is. A lesser known test is the nasal potential difference test which measures how out of whack your body is for electrical current.
https://cysticfibrosisnewstoday.com/cystic-fibrosis-diagnosi...
The only immediately obvious problem I can suggest for the idea of e-bandages is the same one I so frequently have with modern medicine: it strikes me as being pursued or optimized for making money, not healing patients.
The article cites issues with diabetes. Cystic fibrosis puts one at risk for a little known form of diabetes called Cystic Fibrosis Related Disbetes (CFRD).
It seems to me that there is plenty of room for upping our game on understanding how and why the body chemistry gets out of whack such that it interferes with electrical current in the body and providing dietary suggestions for how to prevent and/or reverse such.
But, of course, that's probably not going to lead to a patent that could potentially make someone very wealthy, so it's unlikely to be pursued, promoted, etc.