You can set some posts for only friends to view or to public for those who subscribe to your posts. You have more control over your content and how it's shared. Also, if you block a person, that individual will not be allowed to subscribe to your profile, so it's a win-win situation.
Here's the thing, way too many people have set their bios and all their personal info to private. How can someone know if they want to subscribe to your profile, if you don't tease them with something about you? Make sure you at least post a public bio and give them something to go by in determining if they want to subscribe to your page. You don't have to give up all your life's secrets, but you can share something.
I'm constantly getting friend requests from people who don't allow anyone to see anything about them. I'd like to know if they are Christian, if we have any similar likes or dislikes, if they are writers or readers or someone who just happens to be looking for friends and networking. Tell me who YOU are. Don't be so obscure. You can't build a platform on obscurity.
This simple act will increase your chances of subscribers, especially if you plan to use your profile as a way to build your platform and connect with other people who you don't personally know.
What about you? Have you enabled the Subscribe button yet?
Personally, I haven't enabled the Subscribe button on my page since I've already established an Author Page on Facebook.