Sand is abrasive, and abrasion is permanent
Soil from a lake neighborhood is not soft house dust, it is fine sand. Walked into carpet it acts like sandpaper on the fiber, and the wear it causes cannot be cleaned out later. Regular extraction in the entries and traffic lanes, plus protector on those lanes, is what keeps carpet in a Little Elm home looking good for years instead of flattening out in three. The same grit settles into unsealed grout, which is why sealing matters here.
