The Reagan interruption ultimately did nothing to reverse the destruction of our society caused by those pieces of legislation passed by the most radical Congress in history.
So, yes, Goldwater's defeat did make Reagan possible.
So what?
Is this where he get to unleash our attacks on Reagan for his appointments of GHWB, Sandra Day O'Connor, and Anthony Kennedy. Reagan named people who would undo his own agenda.
For a summary take on the unfolding disaster: Losing America's Multi-Generational Purpose.
Pat's column, here, is thought provoking. It is intended to encourage reflection. You ask "so what," as to Goldwater's role? It goes to encouraging a long-term perspective. The battle in America is now 237 years old, and for much of that period, we have been losing our focus.
We must regain our focus, or we are lost.
William Flax