This isn't the attitude of most feminists, that's just weird GGer rhetoric.
No, these are weirdos. There was an event in political history called the feminist sex wars where most people took pretty normal attitudes about things and then a group of hardliners with dogshit opinions decided sex workers were "hurting the cause" and porn was "inherently degrading towards women". These people ended up teaming up with Christian extremists to push anti-porn laws, but have been an increasingly shrinking political fringe group most people don't take seriously in feminist spaces or are actively hostile towards in those spaces.
It's why the group was only able to get about a thousand people internationally to commit to this call and email campaign; because they're fucking losers.
BUT this group carries on the tradition of working with extremist Christian lobbying groups that are much larger. Also probably helps the group is weirdly anti-abortion, which is a hot take that will get you in DEEP shit with most feminists.
In feminist circles, these people are called SWERFs. Sex Exclusionary Radical Feminists. The group also works with a publication that are called TERFs, Trans Exclusionary Radical Feminists. These people are not welcome in most modern feminist circles. They are, however, really fucking loud and really willing to work with far right groups to signal boost their bullshit.
Which is to say, this isn't a reason men are going down alt-right type pipelines. It never has been. And most people would love if SWERFs would shut the fuck up. We're in this hell together.