“What a weird coincidence that they would decide to use it right about now.”
Methinks it’s the message-sending. Yeah, there was a tunnel complex that is best destroyed and most easily done so with one of these things lying around. ...thing is, we HAVE these things “lying around”. 59 cruise missiles fired off with short notice, just to tell Assad “don’t do that again”. A MOAB dropped on a tunnel complex in a country we don’t particularly care about anyway, used more as a matter of convenient message than existential necessity. We’re telling NK “we have lots of very big weapons, enough that we think little of dropping them on the likes of you - now cut out the nuke & ICBM stuff before you’re the next in a matter of days”; this in contrast to “yes, NK may have a couple nukes - that’s it, that’s survivable, and using them in any way (test shots included) is gonna PISS US OFF and y’all won’t have any left when we start using ours.”
The psychological effect on survivors and message it sends (can you hear us korean Fat Boy?) is almost as good as watching the blast.