You make a very compelling point. Unlike blacks and Hispanics, the single female demographic will be deciding the election of future presidents. Like it or not, this is the hard reality.
We have somehow drifted into a situation where there are only two alternative ways to address any problem:
1. Give the government more power and money.
2. Ignore it and hope it will get better.
Given those two alternatives, which seem to be implicitly accepted by both right and left, is it any surprise that those suffering from the problem vote for #1?
The decline and fall of the family, caused essentially by the sexual revolution, is what created these large numbers of insecure single women and mothers, and thus turned the election.
Could those who opposed the SR as likely to destroy our society possibly have been onto something?