Great essay!
I didn't know that about Szasz and Goff and how pervasive their views were.
I do know that a lot of the reaction in the 60s was from the over-institutionalization that took place in the past 300 yrs, and how it was used to contain women who got in men's way. (Patrick Henry's wife was kept in a straightjacket in the basement because she "developed an antipathy towards her husband and her family." (Probably postpartum depression after the birth of her 6th child. She married him at age 16.)
There is a famous book that helped turn things around, which you may be able to find at ABE or other used book sites online, WILL THERE EVER BE A MORNING? by Francis Farmer.
But then, as the essayist points out, Americans thought it cruel to hold anyone against their will, even if they could not care for themselves, and look where that has gotten us.