Because not being bothered by men is tangential to gender equality and the liberation of women from restrictive gender roles. The original comment confuses the goals of feminism.
You're assuming that only men who couldn't get a partner would be lured away by these AI girlfriends. This assumption is incorrect, thus my original argument stands.
If we assume that the AI is convincing enough to satisfy at least some of them (which is probably not the case currently, but may be in the future), then of course.
If those goals were ever achieved, the need to make those societal changes would vanish.