So you did mention it.... and I did not read well.... (I'm in the bad habit of skimming everything and reading little :( )

I'm not sure why it's there; but the gemara in general has a tendency to meander to aggadata (sp?) and it has a whole bunch of it on megillah. It probably meanders there because it's easier to compile books full of Aramaic than it is to admit that a lot of Tanakh makes no sense.