Pity they don't place these windfarms outside lawyers' offices to take advantage of all the hot air
Let me get this right...you're advocating against investment in renewable infrastructure in a world which is being raped and pillaged towards destruction, and you're argument depends on GA transit between Murray Bridge and Parafield?
Why do you believe GA aircraft need to transit between Murray Bridge and Parafield for training flights? They don't. There's any number of other options available. Hell, aircraft at Murray Bridge don't even need to access Parafield or Adelaide controlled airspace at all - CASA allows the entire training syllabus up to CPL to be completed using simulated CTA.
A student pilot at Murray Bridge has no requirement to ever access Parafield or Adelaide controlled airspace for the entirety of their training, and vice versa. If you're argument is hinging on the need for aircraft to fly between those two destinations for training purposes then prepare to get demolished in court.