We can't generalise people that think being a traditional housewife has its upsides. It's a valid view to have, and indeed many modern women, even Left-leaning ones who support traditional feministic ideals, have zero issue with it. The article you link does indeed reveal a split in contemporary Left thinking (the patriarchy is at fault, misogyny is everywhere etc isn't a position which is universal). And this does partly-explain the popularity of JP.
Also, that tweet-comment you linked is very typical of Twitter: it provides no actual argument against whatever the article is saying, it's just making a facetious comment which is designed to gain likes/shares from like-minded (echo-chambery) people.
Where you could criticise Flanagan is that she has a predictable schtick: attacking other women for making independent lifestyle choices. That's why I personally would not seek out her views. But here she has, correctly, identified that progressive leftism is on the wane and JP is benefitting from that. So that's not really the best article to link if one's aim is to belittle her & by extension JP.