HMC students actually do quite well at getting into PhD programs in CS. According to the NSF, Harvey Mudd comes in second in terms of proportions of graduates who go onto get PhDs in all disciplines (both in general and for women), and they come in second for math and statistics, which is often the broad field computer science is included in in these surveys.
That is not what the article said. Here’s what it actually says.
To help female students feel like they belonged, professors found ways to remove the so-called “macho effect” by which more-experienced students — usually male — intimidated others by answering all the questions. They pulled those students aside privately and asked them to let others speak. They urged students to save their more advanced conversations for time with their teachers outside of class.
One, there’s no blanket ban on men being told not to answer - it was specifically students who were intimidating others by dominating the conversation and answering all the questions. This is nothing new; professors in all classes do this to open up class discussion and prevent certain students from dominating the class and to encourage other students to participate. I did it in my own classes. Two, the professors were not asking those students to never speak; the idea is to get them to step back a little and allow useful discussion to foment. This is a useful life skill, too; when you collaborate on a scrum team or participate in a team meeting, everyone hates the know-it-all guy who talks over everyone and answers everything before anyone else can get a word in edgewise.