I think this is one of those situations where one person feels something is insensitive, another "can't see what the fuss is about".
It's often a generational or cultural thing, but also about different personalities & different "triggers".
It's a minefield, and worse in a world that is changing so fast.
I agree with you, notgrumpyatall, about the pics & I also think if I had done the work you have over the last few days, I would be feeling a lot more than "over-sensitive".
But this seems more like thoughtless than deliberately hurtful behaviour.
As you well know, the only thing to do is to smile & carry on. I think the phrase "man up" should be adapted to "gran up", which is certainly what you are doing.
Lucky kids & gcs to have you around.