So why don't you comment about all our airline aircraft flying around in uncontrolled G terminal airspace like Ballina where there is no transponder requirement so TCAS won't work at all?
And there isn't even a Unicom to confirm the " calling in the blind" announcements are actually working!
I know of course- that's how we have done it since the 1950s and our minds are set in concrete so we must never re allocate airspace categories based on risk. Always keep the status quo.