While it may have been insensitive, if a person is really worried about someone's well-being they need to get off the computer and start making inquiries on the phone. Going on Facebook asking "what should I do?" seems strange. If faced with the possibility of a serious situation, FB isn't the place to run to, imo.
I could see myself using facebook as a barometer. I have OCD and know I tend to overreact when it comes to worst case scenarios. Posting a comment like that would be a way of asking friends "is this as off as I think it is? do I really have cause for worry, or is it just my wcs mentality acting up again?"
I think here the barometer is that, at least for some people, the situation was no cause for alarm. I don't have a problem with the comment and I would be shocked if the commenter meant anything negative by it.