As someone who has walked a mile in your shoes (MIL) I say if your elderly person is in a safe place and can be adequately cared for by others (family or hired) then go and enjoy your retirement. There is a multitude of ways to stay in touch and a return visit to check in or up would be much appreciated.
When a person is removed from their home and placed in a senior center, they become very unsure of themselves and their place in the world. This is especially true of parents who were born during the depression. They are used to being the ones who worked and took care of others so it is hard for them to rest on their laurels. This can be evidenced with guilt trips or even exaggerated illnesses to bring you back to their bedside. If you can reasonably be assured that they are well cared for and can come back for a visit, I say go with a clear conscience.
