And you'd be astonishingly wrong for myriad reasons (not the least of which being that Reaganaut conservatism was the antithesis of the conservatism of the 1950s; there were more contradictions than commonalities between them.).
No it's absolutely correct that the 60s and 70s did more harm than good. They were the drunk and hungover decades. The 1980s were when we sobered up, showered, shaved, and took things seriously again.
Man in the Gray Flannel Suit and Working Girl are examples of American economic progress. The garbage in between was unnecessary and hurt our country.