This is oh-so wrong. Haven't you heard of people working inconsistently? Haven't you heard of activities that just won't come to your hand?
If you are a real poet or writer, you might very well be completely dry and it will be quite impossible for you to write a single word on one page for months, even years! And then maybe the source of inspiration will get some water again, usually because of the winds, and you will throw your master opus in a month, and die happy.
So, ok, go on with your writing-as-other-lift-weight but please keep in mind that some other people might have another idea of what writing is.