fatsoh "that's her job isn't it?"If you are suggesting her job...

fatsoh "that's her job isn't it?"
If you are suggesting her job is to be rude, arrogant, and frequently ill mannered; yes.
"to get answers from politicians who continually obfuscate 'cos they can't give a straight answer"
Mr Tanner was anything but obfuscating, in my humble opinion.
"what's the point in being soft and acquiescing to someone who won't give you a direct answer"
It depends on whether you are seeking useful information, or attempting to embarrass or create conflict for your own 'scoop' ends.
"all you get from soft questioning is the politicians highly slanted version"
Rubbish. That scenario reflects on the incompetence of the interviewer.
"they should all be put on lie detectors when interviewed"
Not necessary if the interviewer has researched the subject in reasonable detail; Andrew Denton is a prime example.