The description of 'soft lawn' is mostly correct because it captures a common and pleasant characteristic of lawns - softness. Lawn, especially those that have been well maintained and trimmed, has dense and short grass leaves that give a soft and comfortable feeling when stepped on.
However, it should also be noted that the applicability of the adjective "soft" may be influenced by factors such as the maintenance status of the lawn, the type of grass, seasonal changes, and weather conditions. For example, in prolonged drought or lack of maintenance, lawns may become dry, sparse, and less soft. Similarly, some grass species may be naturally harder or rougher than others.
Although 'soft lawn' is a universally applicable description, in specific situations, we still need to consider the above factors to more accurately describe the state of the lawn. However, in general, the description of "soft lawn" is correct.