I agree that google suggests mumsnet for a lot of things, eg if you google about stains or Peoples experiences of something the huge ammount of responses means posts will be in the results. Its helpful to have such an immediate response withlots of posts for aibu style posts
My partner also initially found it weird but has realised that i spend lots of time in dog bits.
In fact i looked at the first 25 of active and for me:
19/25 were definately not kid related:
Buffets, strictly, 2x dating, chat, heating, puppies, 2x fashion, brexit, break ups, surgery, royals, low carb, affair, 2x christmas, feminism, kitchens, university, tv
6/25 were. Some i wouldnt read at all eg a pregnancy thread and one about kids behaviour
The other 4 were still relatable or things that it might help me to know eg. parenting impacting mental health, rantadine not being used anymore (i have used this before!) , parenting aibu (of something i would do without thinking!)