I've had no experience of the things you were discussing. I don't think a lack of replies means that people don't care.
Sometimes when I read stuff even when it's about things I do understand - I just don't know what to say.
I think forums are fantastic but it helps to remember that we only see a small part of each others lives - other lives which are hard too. I know from another forum where I've got to know people really well sometimes not replying is just about people already feeling a little overwhelmed before even reading a post.
I reckon it's just better to ask again but say you really NEED help rather than asking why people didn't reply the first time.