As the thread continues I'm less clear on the purpose of the new topic.
A space for childfree women to discuss (or vent) the issues arising from cross societal pressures to have children makes sense.
A space for "infertility acceptance" and going through that grieving process makes sense.
The two are not a natural fit and suggesting that the childfree can offer handy life tips to the childless is a bit off.
You want it on MN to be women centred (makes sense) but then put its "relevance to men" as a plus point. Women are judged for being childfree (selfish), childless (failures) and child having (selfish and feckless) in ways which men are not. Our whole life experience, but especially the having or not of children, is dominated by our femaleness.
There are other women centred forums with childfree topics but you seem not to like them as they also allow gender critical posters - so would this topic ban such posters (as is the case on a number of childfree sites)?
I agree with Chili and User upthread, experience of childfree groups is that they can be a magnet to (often male) antinatalists. They can also become just as smug and self congratulatory as their parenting counterparts. You will need clear moderation around this, especially if you actually want "without children" rather than childfree and that extra modding may not be practical.
The "practical" issues cited are not generally exclusive to the childfree.
The perennial topic of holidays - well most workplaces consider staff needs. Staff needs might be caring for small children, the elderly, the sick, the disabled, having a partner with industry restricted holidays etc. All of those should be considered, only one applies to parents for a few years. If you end up with threads discussing how to supersede the legitimate needs of other workers you will rapidly fall foul of NITS. If the issue is that the workplace is unfairly implementing those considerations then its more a subject for the employment topics.
Inheritance and elder care are both impacted far more by social and cultural issues, the wider family and the local legal framework than having children. Its a very outdated (and sexist) assumption that parents will be looked after by their children. The process of will making is covered by the legal topic where you will be reminded that legal frameworks on inheritance vary even within the British Isles (and MN is international, if skewed).
So to be honest at the beginning it made sense but now it seems to be a fudge of stuff which either doesn't really fit together, is already covered elsewhere or has massive bunfight potential.