User blog comment:Kaijulover1/If Godzilla were real.../@comment-3542924-20150131170552/@comment-3542924-20150320135112

That's because the humans hadn't thought about it in Gojira, Godzilla Raids Again, King Kong vs. Godzilla and Mothra vs. Godzilla, and never bothered to try it again in all the later films after The Return of Godzilla.