It's great you are optimistic, but reality is that it is very hard to gain attention and rewards on Steemit. You should not be saying that any post will get $100, it simply is not correct. The possibility is there but the reality is that most posts only get under $1.00 ( but that is still $1.00 more than FB pays us!).
Also you must be very careful about plagiarism and referencing other sources if you use them, so it's not about posting any sh!t as you suggest, that gives a wrong idea.
I agree with your points on Facebook, they profit from our sharing and giveback nothing, Steemit at least gives the possibility of real rewards not just a ton of unwanted ads.