I think it is a function of outside forces. Jobs get hectic, you have other things in your life that are important too and each thing takes time. It comes down to making choices.
I haven't watched a TV show from start to finish in months. I always get the feeling I should be doing something else...something more important.
To write well, you have to read well. There are so many good writers out there that you could spend a lifetime of reading and you still not scratch the surface. To write well, you also must study. The more I learn about writing, the more I realize I don't know squat.
OK, I'm through beating myself up. Please go back to your Regularly Scheduled Internet Surfing.