Reread their comment - they are pointing out that CS classes had a DROP in women attending them, and that decline does line up with the rise of computer gaming. They weren't saying women have never had an interest as a result of gaming, but rather as gaming rose there is a corresponding decline. Hardly proof, but as the poster above was stating their personal opinion, they aren't wrong (and they aren't alone in that belief - I've seen it many places).
Here's once quote:
"Starting when computer technology first emerged during World War II and continuing into the 1960s, women made up most of the computing workforce. By 1970, however, women only accounted for 13.6% of bachelor's in computer science graduates. In 1984 that number rose to 37%, but it has since declined to 18% -- around the same time personal computers started showing up in homes. According to NPR, personal computers were marketed almost exclusively to men and families were more likely to buy computers for boys than girls."
( from https://www.computerscience.org/resources/women-in-computer-... )
Here's a graph of the data: https://images.techhive.com/images/idge/imported/article/ctw.... ( found via https://www.computerworld.com/article/2474991/women-computer... )
Those are only talking about successful degrees, there are plenty of more datapoints to look at when you consider entry vs completion, and similar stats from post-graduation careers. This doesn't prove causality, but their statement stands as viable.