Thank goodness for this thread. @Reallyneedsaholiday I feel exactly the same. I have 2 adult DC - late 20s/almost 30 - both left home almost a decade ago, and DH and I see them every couple of weeks. They are both high flying professionals with university degrees and successful careers, and are both in relationships, and they have very busy social lives, and neither one of them wants children. And I couldn't care less.
Like you, I 'cared' for some 27-28 years (when you include children and elderly, infirm family members,) and I have been free of caring for about 5-6 years. I love it. I love the freedom of not having to think about others, and spending my time nursing and caring for people. (And I am touching 60 and need to take care of myself, and my own health! And yes, put my own needs first.)
I don't care if they never have children. Oddly though, my DH (my DCs dad,) says he is a bit disappointed, as he was looking forward to grandchildren. He's not devastated, but feels an inner sadness. I said, they're not even 30 yet, they may have a child eventually, but truthfully I can't see it.
I know you can be a carer for your grandchildren as much - or as little - as you like, but I know my 2 will be mithering me to babysit/childmind, because of their busy lives and the cost of childcare. Even though they are fairly high earners, the cost of childcare is horrific, and they will prefer not to pay it. I don't want to say 'no' but I will have to, because apart from the odd afternoon here and there, I don't want to be looking after babies/small children. Literally CBA. I've got my own life. And it will be me, not their dad doing it. It's never the men!
I know a number of 55-75 year old women - as I said always the women 🙄 - who are knackered, worn out, weary, and perma shattered because of being full time childminders/nannies for their small/infant grandchildren. LOL, fuck that for a game of soldiers.
I mean, of course when they come along I will love them. But I am still not going to be a full time childminder for them, or a 1-3 times a week babysitter. Nope!