Even distribution, before the tamp.
A WDT tool breaks up clumped grounds and evens the bed in the basket, so the puck starts level instead of lumpy.
Consistent pressure, every pull.
The calibrated tamper is built to a fixed compression point, so you tamp with the same force every time instead of guessing.
Two tools, one habit.
Distribute, then tamp — the whole pre-shot ritual in under a minute, using tools sized for a home counter, not a café line.