It's important to remember that feminism is not a monolith.

There are sex-positive feminists and there are Puritan feminists.

Some of the most vocal feminists are literally lesbians. Many of them hate men and/or think that all sex with men is criminal.

Then with the infantilization/overprotection dogma, anyone under 20 is a helpless child so obviously "vulnerable young girls" need men with guns to defend them against evil horny men with penises.

Many smart progressive sex-positive feminists fell into this trap. They still believed that sex is good, BUT they became convinced that sex NOT for anyone for whom an age-gap might cause a power imbalance which is ABUSE!!!!! PANIC!!!!!!