What this means is that they should have used more contraceptives then as it has now cut alot of these unmarried pregnancies you site as examples of failure of sex ed.
That same article goes on...
Such realities have drawn dismissive responses from sex-ed advocates. Incredibly, the horrific trends of the 1970s and 1980s were offered as reason for more sex education.[13] Yet amid cover-ups and excuses, the sex-ed crowd's true motives were exposed in 1978, in of all places, Congress. One committee report noted that despite sex education's stated objective of reducing teen pregnancies and sexually-transmitted disease, the real goal "of most sex educators appears to be encouragement of healthy attitudes about sex and sexuality."[14] "Healthy attitudes" is sex-ed code for super-sized libidos in already hormone-ravaged kids.
By the early 1970s, Planned Parenthood and sex educators were already doing what John Goodlad called for in 1971 when the educational theorist wrote, "Most youth still hold the same values of their parents... If we do not alter this pattern, if we don't resocialize... our system will decay."[15] But in each instance in which progressive wisdom has been applied to "values"-based arguments, actions based on the wisdom have caused social decay. Sex-ed wisdom follows the pattern.
By the early 1970s, Planned Parenthood and sex educators were already doing what John Goodlad called for in 1971 when the educational theorist wrote, "Most youth still hold the same values of their parents... If we do not alter this pattern, if we don't resocialize... our system will decay."[15] But in each instance in which progressive wisdom has been applied to "values"-based arguments, actions based on the wisdom have caused social decay. Sex-ed wisdom follows the pattern.