The simple answer to this question is because we are waiting for the next Hard Fork of Steem to implement features requiring custom operations with Posting Authority.  Hardfork are always "challenging" and put stress on all of exchanges and businesses building on the platform. We try to limit them to once per month.  

It isn't because we don't want the feature, it is simply a matter of scheduling. Also given a set of people who you are "following" what is the expected behavior?  Add all feeds together?  What happens if you follow too many topics / people and get spammed.  As simple as "follow" is from a user experience, it is much more complicated under the surface to implement. 

The recommended section is there as a stop-gap measure.  Some people don't like to figure out who they should be following, it requires users to make a decision.

Additionally, there is debate on whether or not following preferences should be public (on chain) or private.  People want both.    

![](https://cdesertroseauthor.files.wordpress.com/2015/04/wait-for-it.jpg)
Conclusion....  if you want Steemit to be Legendary, you have to wait for it.

There should also be the ability to manage your topic if you decide to create your own category. Such as add a custom banner etc.