As a blogger who posts a lot I frequently repeat myself in various ways. I also quite frequently write things which are fairly obvious. In addition, not every post contains the entire universe. But, you know, I'm aware of all these things and it's always amusing when occasionally people think I don't. I don't think if I say something fairly obvious that I am showering great wisdom on you, thinking thoughts no one has thought before. The fact that I leave something out of a post does not necessarily mean I am unaware of it. And as for repetition, I actually think repetition is important.
This sounds like a grumpy post and I don't mean it to be, just highlighting something.