Question:
Do dudes really want more casual sex?
Most dudes tend to give up on seeking casual sex after a while. Couldn't one assume that casual sex is a coping mechanism for their other needs not being met? In which case wouldn't having more casual sex only encourage them to waste more time before they start getting their lives together?
Now that I've read your description, I'd address some of the things there as well:
"Better access to quality child care"
It's called parents (two of them, one of each gender), the quality depends on how much effort they (both) put into parenting. Feminism does not offer anything for that, in fact it does the opposite by discouraging women from being mothers while encouraging single motherhood for those who do end up with children.
"No greater social stigma towards promiscuous women than towards promiscuous men "
Feminism does not do anything for this either. It often does the opposite when it attacks women whose job requires them to look attractive and not to forget that most of the time when unlikable people say that something is bad, then people just think that this thing is kind of edgy and cool. For example the kids on TikTok are making memes that are shaming promiscuity in women, which means that you've lost the next generation on this issue thanks to how unlikable feminists are.
Just like the religious right lost the previous generation to promiscuity and degeneracy due to those things being seen as edgy and cool thanks to how unlikable the religious right was while they were opposing those things.
"Better social support for poor and/or single mothers "
Absolutely not, single motherhood should not be encouraged or rewarded. In fact the opposite should be done. Being raised by a single mother is close to being the worst thing that could happen to a child. Parents should be rewarded for staying together.
However noticing that most of these are about having children, how exactly do you think these would promote casual sex? Do you think that women would stay barefoot and pregnant sucking any random dick for government welfare?