I agree that can be a let down, but it’s likely these schools are looking for something pretty specific…increase URM %, or they have run out of FA (so only full pays can get off WL), or certain majors are full at schools that admit by major, for a few examples.
With around 700 colleges on NACAC’s colleges with openings list, there are many schools not considering any applicants on the W/L , or they have already taken their W/L down to zero.