I'm meeting my writing goals but by binge writing, not writing every day. Is this bad?

NaNoWriMo has been over for exactly a week now and I wanted to show you guys something. I have had several people ask me why I keep tweaking my writing goals when "obviously I write a ton." Let me show you the problem. Visually.

The following is a graph of my word count for November's NaNoWriMo novel (x axis is the date, y axis is words written per day, forgot to label them). The goal of any writer is to write every day. Every single day. In fact, in many ways, that's the...