Interesting that the original post demonstrates the same reaction to that new strategic parity weapon as the one caused back then by the original strategic parity weapon - the nuclear - to dig into the ground on the basis of the same key principle of "nowhere is safe"
I'm sure that even in the future when another strategic parity weapon emerges - say it would be a throwing rocks from space or a cheap mass production of autonomous nanobots precisely delivering some strong poison/pathogen - our first reaction would be the same urge to dig into the ground.