With my enlarger, when I make small prints (5x7 or smaller), the exposure time is often less than 5 or 6 seconds, often requiring tenths of a second accuracy to get exposure just right. That would be difficult without my timer.
That has to be frustrating and wasteful of paper and time. It would be to me. I would seriously consider adding some neutral density and/or getting a lower-output lamp. Then you won't need to deal in fractions of seconds.
"Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."