I don't think the world shut down for a laugh, but similar to what others said, I think people are tired of having everything compared with death, especially that type of very visible, painful mass death.
Among all the media reports and confusion from early 2020, what I remember clearest is when exams were canceled. I told my DS1 moments after the announcement and he sobbed, he'd literally just finished a practice paper. When I later went online and saw other teenagers expressing the same hurt, I saw grown adults telling them that they should be grateful, that they need to buck up, how weak they were, they needed to think of their grandparents and WW2. I remember my rage both at how the government was acting and how so many adults who should have known better were acting like any upsetting emotion on the matter was wanting people to die and being too soft.
It's still happening now and it's so draining - the government's vague language & messy actions perpetuating further us vs them rhetoric and themselves above the law and people still telling those who are hurt or sad or upset that they don't have enough perspective & don't they know people are still dying so they're not allowed to be sad or annoyed at canceled festivities, like there is no way people couldn't know or have cared for dying people and still feel sad about anything else.
People are reacting to that type of emotional manipulation with a lot of pent up feelings largely from other factors with the loss of what little control and solid ground people have had. Some of the reactions may be cutting of their nose to spite their and others' face, but I think it's more remembering the clusterfuck than forgetting.
As for nefarious purposes, I more think the World Economic Forum and similar who chose to use language like "the Great Reset" or Gates linking Amazon deforestation to the toilet paper scramble just proved how disconnected they are from most people and life in general. They think they're doing the right thing, and that can sometimes be the scariest motive of all and should rightfully be questioned particularly those with so much social power. My intent means little in the grand scheme, but some of them can do a lot more and if anything, the pandemic just showed it even more.