Novelists do not write as birds sing, by the push of nature. It is part of the job that there should be much routine and some daily stuff on the level of carpentry. ↗
But novels are never about what they are about; that is, there is always deeper, or more general, significance. The author may not be aware of this till she is pretty far along with it. ↗
I have heard of novels started in the middle, at the end, written in patches to be joined together later, but I have never felt the slightest desire to do this. ↗
Let me back up a little and tell you why I prefer writing to real life: You can rewrite. A novel, for example, can be cleaned up, altered, trimmed, improved. Life, on the other hand, is one big messy rough draft. ↗