Isn't everything?

Whether you get it done or not depends on how much you want to do it. Want to learn to ride a bicycle? You get on the bicycle, fall off the bicycle, get back on the bicycle, sooner or later you are riding. No-one gives you a DVD.

Want to learn to program your own styles, or edit an arranger SMF? Same system. Yes, you use what is available, but when nothing is available, you teach yourself. Or you don't learn.

It's up to you...