Yeah, they're not. Women are providing for themselves. And remaining single. Single women now own about 2 million more homes than single men in America. And women are outpacing men in colleges as well. I assure you, most women (especially young ones) are no longer depending on men.
And the only real way to get regular sex is to find a woman willing to provide it. Most women will only do so within a relationship as you've pointed out (and for good reason - STDs, unwanted pregnancies, and such are largely risks borne only by women).