It reminds me of the old "saying" "S^&* happens" that sort of caught fire way back (Gump days). Duh. It was never "funny", perhaps mildly amusing, not even insightful.
But it was fairly popular for a time, as one example. Folks can of course say or post "FJB" and mean the same thing, but it's viewed as more clever I suppose to say LGB.
I personally would neither say it nor feature it on my person. It is a way for folks to display their politics in public, much as wearing a face mask when it's clearly not needed is a means of doing this. (I understand it when I see an Asian wearing one, they likely were three years ago also.)
Wearing a face mask today (when it's clearly unneeded) is a way to signal "I'm a woke liberal who hates DT". Ok then. (It's also a way to keep your face warm.)