re: Explain to me the [so-called] logic of this decision of JPL.
"Any of you have the guts to tell me I'm wrong on this one?"
Yup - it's being used on other moons as well.
" In addition to bouncing radio waves, the RADAR instrument will listen for radio waves that Saturn or its moons may be producing."
http://saturn.jpl.nasa.gov/spacecraft/inst-cassini-radar-details.cfm
"To acquire data on non-Titan targets (rings, icy satellites) as conditions permit."
Doug