Call me insensitive, but as someone who experienced 9/11 as an adult, being able to enjoy actual funny jokes that reference the attack is kind of refreshing, especially jokes created by the generation born after it happened.
I have nothing concrete to base this on, but my observation is this:
A 9/11 joke written by someone who lived through it is more likely to be about 9/11
a 9/11 joke written by someone born after it happened is more likely to use 9/11 to punctuate a joke about something else
Ashley Gavin has a stand up special where she does some 9/11 jokes and they're pretty good. I think she does a good job of it, but she wasn't an adult when it happened so I think that changes her perspective.
I would never normally associate anything positive with the word collapse and I gotta say that I kind of see what you mean, but I'm still not convinced it's clear wording