No, here is a real life example.
I have ingested a shoot from a Ranch in Colorado.
I globally set the IPTC data, keyword, to include the word Buffalo.
However, after ingesting I noticed that ALL the images have Buffalo in them (just as I told it to). So now I need the ability to select all the Grasshopper images, remove Buffalo and add Grasshopper & Macro, without affecting the other existing keywords.
Etc.