Absolutely. The only cases that might make sense for building are down in cave systems or as the military does, make a deep cavern with a nuke. Which we do by the way, and we have plenty of those scattered around.

If we have a magnetic pole reversal as some anticipate, earth surface radiation may be bad for awhile so we need a backup means to preserve some humans. I believe that we, Russia, and China all have such facilities for longterm survival. I am not sure what a 20 year old Russian MRE would taste like so I am not defecting any time soon.

Absolutely. The only cases that might make sense for building down in cave systems or as the military does, make a deep cavern with a nuke. Which we do by the way, and we have plenty of those scattered around.