We'll either develop and stage nuclear bunker busters, or we'll use cratering nukes for the same purpose when the time comes for their necessity. ...one or the other. Nuclear bunker busters would be much less hazardous and easier to clean up.
My understanding is that we're doing research into ways of making much smaller bunker buster nukes. Smaller nukes would minimize blast damage and dispersal of radiation, and DiFi should be happy about this (but oddly enough, she isn't).