I think it is to each their own. I don't enjoy dragging things out. Projects become a burden and not a pleasurable experience for me if I do. I am doing a BOM for the first time this year and loved the quilt when I signed up. I now hate it. I will finish it but I am not sure I will keep it as I planned.
I sew quickly. I also walk quickly, drive fast and finish books within a day or two of starting them.
None of this is a contest. It is just what satisfies me. If a different pace is for you, I am happy for you.