I kind of had the same thought the person you are responding to had. You switch from "I" to "you" in your last paragraph, which seemed to imply that you were using your experience to declare how things are for others. I found myself nodding while reading the prior paragraphs, as I have similar experiences, but disagreeing with your last paragraph as it clearly wasn't true for many others. It's somewhat true for me now, but I joined Facebook because my mother was quite (terminally) ill, and it was a perfect medium to share with her but not place any particular burden for her to write emails or respond. And I'm the 'you' in the context of your message.

Thanks Roger. I hadn't realised that you could read it in that way. I was talking about myself, but it wasn't clear.