Interesting and potentially dangerous. But as long as many millions of pigs are covered in antibiotic foam (which is just rinsed off into the drain), I'm not gonna lie sleepless over this. Resistant bacteria will cause humanity huge troubles if we don't manage to do something radical soon.
The answer is phages. But last time I went into the rabbit hole the TLDR was that it is not patentable so there's no money in it. And everyone needs a different phages cocktail. I sleep at night knowing that push come to shove someone will step in and mass produce machines to create personal phage cocktails.
I think you are overlooking some of the major technical problems with phages. In no particular order:
1. The immune system develops antibodies for many phages.
2. Microbes develop resistance to phages.
3. Phage multiplication using host cell is a primary step for phage production, and this causes many (serious) adverse effects.
4. Only obligate lytic phages that lyse the bacterial cell directly instead of integrating its genome in bacterial DNA (temperate) are usable for phage therapy. Temperate phages play a major role in the exchange of genetic material between different bacterial strains and often contribute to the pathogenicity.