First, why do you think Facebook limits the organic reach of pages? Why not allow all users who have liked a page to see every single post?
There are two main reasons why Facebook limits organic reach.
The first: it can help Facebook make more money because businesses with poor page reach will spend more on promoting posts through Facebook ads. As organic reach has dropped, Facebook stock has risen!
The second one is much more interesting to you and me.
Facebook wants to create a good user experience for everyone using the network.
What this means is every user needs just the right amount of new content in their feeds— not too much and not too little.