what you say; really 'rings true'; as me and mum have lived together since my father died about 8 years ago.
For a variety of reasons I have never worked so have been at home with them (( Well forever really))
In the real, real distant past, we would all get up, do a variety of jobs around the place, we have some land with a few outbuildings and met up for meals and in the evening.
That above paragraph probably describes my life since the 'year 2000' (wasn't that a song !!!)
Then in 2016; Dad sadly died and so me and mum adapted slightly and then as you said above we probably unconsciously have been adapting since the Dementia Diagnosis in 2021.
So yes I can definitely see your point where our 'lifestyle' which basically we were in control of could simply adapt with Mum and her decline.
For example we went from Mum doing all the clothes laundry, too me helping her, too her trying to help me, too her not even recognising the concept of 'clean clothes' .....
So thank you for pointing out something that was there in 'plain sight' but needed identifying.