Yeah, using a 2000lbs normal bomb as a substitute for a Nuke is “realism”.
2000lbs is less than half of a Tallboy, about the size of a Mk84, but it is as powerful as the bomb that obliterated Hiroshima and can cause a nuclear winter on Guadalcanal Island.
What a “realistic” game Capt keef has in mind. 
You’ll love Fallout 76, a super-realistic nuclear OnlineRPG.
Maybe because realism never existed in this game to begin with?