First off, thanks for the discussion, and this is an important question to ask as Democrats unpack why they lost. It boils down to "does moving to the central position gain more voters in the end or not?"
The argument I'm making applies in reverse too. What if there was polling data that indicated that this issue shifted the seven percent who were las likely to vote for Harris into not voting for Harris or not voting at all?
If that's the case, then their decision becomes more understandable.
Lots of us have them. (Well, basic scales which weigh a tenth of a gram.) They're useful when weighing compressible dry ingredients like flour and brown sugar, and viscous wet ingredients like molasses and corn syrup. They're also helpful when you're multiplying a recipe by a factor that doesn't result in useful units; it's annoying to figure out how to measure out fractional cups that involve teaspoons.
They also help with portion control if you're watching calories.