I have a DD13, and the challenge has become trying to find anything to be required for! .... it's much more about worrying that she has needs or things going on that I could help with that she isn't telling me, than her demanding attention! It can be stressful, but certainly isn't time-consuming for now!
I agree things get a little easier most years.
For me, the big change came around 3-4... she can get her own coat on.... wipe her own bum, brush hair... go up the Stairs without me having to be within 30 cms, in case she stumbles, and she has some sense of self preservation (won't stick her hand in a naked flame because it looks pretty!) etc....
Then there was another big advance when there was a bit more emotional steadiness/maturity. Maybe around 7..,. When it felt they had a good sense of basic life, not needing to explain or justify every single little thing, and less need to moderate/prepare for everything/ teach the basics. And you can start giving tasks that actually help you, rather than just to teach them how to do tasks.
And now, into teens, it is another big leap- run out of milk? I can actually suggest she pops to the local shops and gets it! I can be out for a couple of hours without arranging childcare. They have 3-4 basic meals they can make for themselves if they are hungry. Their desire to interact also shifts much more to friends, so far less is required of you.
I would imagine this can reverse at any time. And the thing that scares me about teens is how big the problems can become and how it is hard to know about them.... but in terms of actual exhaustion, it tends to be much easier!