I think it used to be fear. It still is a huge problem, but most of us face distraction to a degree never seen before.
Like calling yourself a writer because you write, if you make stuff, you’re a creator, or an artist. That’s it! No one can tell you when you’re allowed to be one, and by opposite turn, no one will stop you from not making. Indulge in distraction too long and it’s procrastination, then blockage, and finally you aren’t a creator any more.
It isn’t always easy, but it is a simple path. The most basic identity comes from what we do, and thus what we are.