Yes, there are people that stupid that they'll advance their opponents' cause whilst simultaneously destroying their own cause
This is not the first time a Leftist has made this suggestion. I believe Alyssa Milano made a similar suggestion a while ago. Now, you should all see the irony in this statement. If women stop having sex, then they'll stop having pregnancies (especially unwanted pregnancies). If they stop having unwanted pregnancies, then they'll have no need to have abortions, thus resulting in abortion companies going out of business.
With pro-aborts like this, who needs pro-lifers?!