Mary Daly was a Catholic professor of theology and prominent second-wave feminist in the late 1960s/1970s, and according to her "If life is to survive on this planet, there must be a decontamination of the Earth. I think this will be accompanied by an evolutionary process that will result in a drastic reduction of the population of males." Valerie Solanas argued for total androcide in her 1967 SCUM Manifesto (IMO a very underrated book).
These ideas are not new, are not liberal, and should not be particularly surprising if you stop emotionally investing in consumer society, corporate indoctrination, and "traditional" (authoritarian and misogynist) cultural values, and instead look at where the life-carrying capacity of the Earth has been, where we currently have reduced it to, and where it is heading towards if present trends continue.