Negative, but a Suitcase Nuke isn't an A-Bomb either. It's Nuclear.
It's possible to fit what can level cities into a suitcase, where it might be the size of a milkcart normally. About 90% of the power, condensed into something you can carry.
To tell the truth, it scares the pants off the US of A.
Although, comparing anything in Disco to real life just makes you look kind of silly. We have petty thieves and criminals piloting massive, military-grade warships.
It would be like saying that Disco Fighter Dogfights are much like WWII Dogfights, when in reality, Disco Fighter Dogfights are like WWII Dogfights on steroids, in space, with physics that are about as realistic as the Force in Star Wars.
Point is, it's a simple balance thing, bombers need the 'umph' to take out capital ships that can nearly do the same job as them, dock on the same bases, fight the same fights etc.
Everything is fine between bombers and capital ships now, and for 4.86. Caps need to be nerfed more to be more resiliant. For example, restricted docking to only large, cap-supporting stations, slower cruise etc.
