[Someone]

If your targeting isn’t very precise and you want to destroy a hard target such as the Cheyenne Mountain Complex 50MT doesn’t seem overkill.

According to https://en.wikipedia.org/wiki/Cheyenne_Mountain_Complex it was “built to deflect a 30 megaton nuclear explosion as close as 2 kilometers”.

[Fej]

Far easier to hit something with several single-digit-megaton weapons than with one 50 MT weapon.

The Tsar Bomba was completely impractical and was shown off as a display of technological superiority, or slightly more accurately, dick-wagging.