The wikipedia article you referenced indicates that bacteriophages have been a subject of intense research at virology labs for the last several decades. The suggestion is that laboratories could engineer a bacteriophage that attacks select drug resistant viruses.
That would be helpful.
Hey, you know, if one combined bacteriophages with highly infectious viruses, then one could create a mechanism to deliver bacteriophages to the entire population at once. This sounds like the exciting type of gain of function research that would intrigue leading public health experts like Dr. Fauci.
But, since public health industry is driven by an altruistic motive to serve the community at large and not by oversized egos, we can say with certainty that such ideas never crossed anyone one's mind.