When topdressing with compost, only a 1/4" is usually applied at a time. Most of the fines drop right down to the soil. Larger pieces are washed in with irrigation. The turf is never smothered, In fact, when I look at what I have just applied I usually think there is not enough. But then I remember the times I have applied the same amount to sidewalks by mistake and they are covered with compost. Top dressing with compost has many benefits for lawns. But it may not be a good fit for many companies and can be cost prohibitive for their clients. There are other options available that will provide similar results more economically. That being said, there is nothing like the benefits of good compost for all plants.