In a different context, I was told how strong I was, although well meaning, it irritated, I had no choice to deal with what was on my plate and so a large extent at the time I was putting a brave face on. No one can say they know how you feel (another regular comment at the time) as they are not in your shoes, and don't know how things are affecting you.
As you know it is my mother who has dementia, she is very contented, when I moved her into her flat, she went to all the social activities, and did jigsaws and crosswords, these things are too difficult for her now, and she spends a lot of the day snoozing but is happy. I don't see that much of her in reality, just popping in with her food as with 2 kids, and all their activities there isn't time. She enjoys seeing the kids but they can only cope with her repeated comments for so long.