@jhfs8979 I feel similar about my dh
His parents are elderly and mostly housebound and have carers and other suppport coming in. They are warm, fed and get visits from cleaner, physio, befriender etc. But each visit lasts an hour and his parents are lonely and bored. Especially at weekends.
dh thinks that he and his siblings should have a rota meaning he would visit once a month. Other siblings are all going twice a month and I think it is becoming obvious that dh isn't doing an equal share. NB other siblings are still working and dh is retired so he theoretically has more time, but in practice has filled his life with projeccts and hobbies.
I totally understand that there's not much joy or excitment in the visits - mild dementia and hearing loss (theirs not his!) make conversation almost impossible so visits consist of helping out with various tasks and watching the TV. dh does pull his weight when he's there - cooking, cleaning up, doing various household tasks, gardening etc. I go whenever I can.
It doesn't help that PILs live 2 hours drive away, so every trip involves 4 hours car journey, but it's pretty much similar for the other siblings.
Other siblings also phone almost daily (their choice), send letters and cards and are just a lot more 'involved'. One sibling organises the carers' support / social care, another deals with the finances. One helps her Mum with clothes, hair washing, looking after her nails etc.
I feel like I have to prompt dh to call and remind him abut visits - he's reluctant to plan much in advance and I feel like I'm nagging him. I do feel that I've lost some respect for him and I see him in a different light. He had a very good childhood and loves his parents but he is putting his selfish interests first. I know that when at some point things change (we expect a crisis at any time), he will do everything he can to provide practical support and has spoken about moving in with them (for a limited period) if either were on their own for a while.
I try not to say anything, his relationship with his parents and siblings is his responsibility, but I feel it also affects my relationship with them too.
Sorry OP, I've not provided any solutions.
For those suggesting shelterd housing, care homes, nursing homes - we (that being the wider family) are finding it almost impossible to get that kind of support.