Because you have to start from where you are. This should be fairly easy; Otherwise you have not started from where you are.  A suggestion is to start writing piano pieces for beginners in a progressive order.  

Welcome to my article about how to practice singing. As you read along this article, I will give you three of my top tips on how to practice singing and I hope that you will take these simple tips on board to help to improve your voice.  I am the type of person that loves to sing. I sing almost everyday. I don't sing for a very long time, but...

It's a stated fact, everyone can sing, but does every one possess a superior method and technique needed to excel, impress and succeed while singing? That answer is obviously no. The importance of singing is one thing, the importance of possessing a good singing method and technique is yet another. 

The improvement you will make with your guitar playing simply by working on your rhythm and timing skills is massive! No matter what style of guitar/music you play, this is one of the most important and essential areas of your development as a musician.

Sweep picking is a difficult technique for most guitar players to master. But no matter how much trouble you are having with this technique now, I'm about to show you how easy sweep picking CAN be. Actually, once you understand the principles covered in this article you will be able to use these ideas in ALL of your guitar playing... and improve...