Like most folks I reckon, I like original content, and I've written a ton of it myself. I can appreciate those who prefer originality and new thinking about time-worn topics.
On the other hand, there are only so many ways to describe things. If you read enough on one subject it's going to all seem like rehashed information. This is true whether you're reading websites, ebooks, print books, or magazines. When you know a topic well enough, it's always the same old in different words.
Newbies can take a big clue from that. If you're finding the information in products you buy is something you already know...
...maybe that's a big clue that you know enough to start taking action!
You're going to learn some things by reading, and some things by doing. If you're reading the same old things, it's time to start doing.
And as far as rehashed content goes, there's room for everyone. Different writers and different styles of writing appeal to different people. And while the thrust of each "rehash" may be very similar, I almost always find at least one or two points that give me food for thought.
Besides, there's duplication in every industry, online and offline. It's called competition. You shouldn't expect it to be any different in IM.
The next time you feel like complaining about rehashed information, think how it would be if there were only one maker of pizza, only one boy wins girl movie, only one of anything with no other products competing.
I like having choices. What about you?