Then there's another interpretation of "earth" which would be something more like the Jewish system at the time. Some preterists ascribe to this idea as it seems to make more sense given the rest of revelation.
by committing spiritual adultery, as she often did, Israel became a harlot, this is confirmed by the bible. There's a lot more in revelation that points to Israel/Jerusalem being Babylon the great, mother of the prostitutes.
Anyone remember what her fate was supposed to be? And the "this generation" that Jesus was speaking to would have witnessed it all.
I'd be a preterist for sure if I still believed in the infallibility of the bible.
(preterists believe some or all of the end time prophecies were fulfilled in the 1st century, centering on the destruction of Jerusalem)