I prefer not to use minions altogether
In connection with that, I am more interested in what the designers expressed -- the RAW -- than in the best RAI. (Or you could say that I think the best RAI is to cut the rule altogether.)
As for what is RAW, there is a plain reading with a coherent* result that introduces no extra words and respects the whole game text, so to me other readings aren't equal to that one.
*Its coherence is sustained by the principles of interpretation laid out on PHB 11. One can ask a question like - "Should it be in principle possible to exclude a creature from the knocking unconscious rule?" And see immediately that it should be possible and how one could do it (and that one should be wary of interpretations that might make it impossible!)