"Underground installations have ventilation shafts"
Yes, and at 2 meters, they are the same size as womp rats that our boys used to hit at home all the time.
Seriously, as a pilot, the solution is a high mass penatrator. In the age of smart weapons, vent shafts now have 90 degree bends in the them, as do doors, and they are far from the target.
The idea of an orbital weapon coming down like the fist of an angry god is really not that absurd. Israel certainly could orbit one.
“...vent shafts now have 90 degree bends in the them,
as do doors, and they are far from the target...”
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It doesn’t matter how many bends they have or how far away they are;
destroying the ventilation and the access makes the facility useless.